Every Cold Atoms Experiment in the World

Optical lattice experiments. EIT and magnetometry. Quantum Fluids. Joint Quantum Centre (JQC) Durham-Newcastle

Our group deals with theoretical and computational atomic, molecular, and optical (AMO) physics with primary interest in the physics of Bose-Einstein condensates and out-of-equilibrium dynamics.

I'm interested in nonlinear optics, atom optics and optical precision measurements. In nonlinear optics, I study photorefractive systems for measurement and information processing, especially self-organized information processing. Our group is currently investigating acoustic and RF antenna-array signal processing and sensing of chemical vapors. Atom-optics research centers on the development of atom waveguides, atom "chip" technology, and the use of Bose-Einstein condensates to make practical devices. The group is currently developing integrated atom interferometers for inertial navigation and other sensing applications.

Systems out of equilibrium; ultra cold quantum gases; Casimir-Lifshitz interaction; radiation-matter interaction; disordered systems; heat transfer; elementary quantum systems; entanglement; open quantum systems.

M. Antezza, B. Guizal, R. Messina, D. Cassagne

Rb BEC, single atom trap, atom interferometry

BEC in optical lattices, molecular quantum gases

Alain ASPECT (Professeur chaire Augustin Fresnel de l'IOGS, Directeur de recherche émérite CNRS), Denis BOIRON (Professeur IOGS-U.Psud), Isabelle BOUCHOULE (Chargée de recherche CNRS), Thomas BOURDEL (Chargé de recherche CNRS), Philippe BOUYER (Directeur de recherche CNRS), Marc CHENEAU (Chargé de recherche CNRS), David CLEMENT (Maitre de conférence IOGS-U.Psud), Vincent JOSSE (Maitre de conférence IOGS-U.Psud), Laurent SANCHEZ-PALENCIA (Chercheur CR au CNRS et Prof. CC à l'Ecole Polytechnique), Christoph WESTBROOK (Directeur de recherche CNRS; group leader)

Neutral Atoms for Quantum Information Processing Our research focuses on the use of ultra-cold atoms for neutral atom quantum information applications. We investigate the use of micro-fabricated magnetic traps (atom chips) and optical lattices as a means to trap and manipulate large arrays of atoms (qubits). To provide the necessary interaction between individual atoms we will investigate the use of micro-cavities.

My research interests are related to the theoretical analysis and numerical simulation of ultrafast processes in atoms, molecules and clusters interacting with intense laser pulses. Laser systems currently generate light pulses with field strengths exceeding that of the Coulomb field within an atom or molecule. Pulse durations are as short as a few femtoseconds (10-15 sec) or even less in the attosecond regime, which correspond to the time scales of electron and nuclear dynamics in materials. My group pursues theoretical studies on the coherent control of chemical reactions, the observation of correlated electron dynamics in atoms and molecules, the imaging of molecular dynamics, and the propagation of ultrashort intense laser pulses. We often work in close collaboration with experimental groups.

Currently I am looking into the opto-mechanical properties of Bose-Einstein condensates in optical cavities. Particularly how the condensate modes can couple to the cavity mode and the mirror mode. I am also looking into the aspect of the use of BEC to detect weak forces. Other aspects that I am looking into is the parametric excitations of BEC.

BEC, cold molecules, atom chips, non-linear optics

Quantum Optics, Atomic Physics, and Quantum Dynamics

Ultracold quantum gases in optical lattices

My primary research centers on the theory of collisions between trapped atoms and molecules in a dilute gas at milliKelvin temperatures and below. In this novel energy regime, tiny energy splittings (due, for instance, to magnetic interactions or molecular rotations) dominate the collision dynamics. My goal is to unravel these delicate energy exchanges and assess their response to external electromagnetic fields. More broadly, I'm looking for novel approaches to understanding collective motions of many-body quantum-mechanical systems such as electrons in an atom or semiconductor device or atoms in a Bose-Einstein condensate.

Optical lattices; Bose-Fermi mixtures; optical clock.

Alain ASPECT (Professeur chaire Augustin Fresnel de l'IOGS, Directeur de recherche émérite CNRS), Denis BOIRON (Professeur IOGS-U.Psud), Isabelle BOUCHOULE (Chargée de recherche CNRS), Thomas BOURDEL (Chargé de recherche CNRS), Philippe BOUYER (Directeur de recherche CNRS), Marc CHENEAU (Chargé de recherche CNRS), David CLEMENT (Maitre de conférence IOGS-U.Psud), Vincent JOSSE (Maitre de conférence IOGS-U.Psud), Laurent SANCHEZ-PALENCIA (Chercheur CR au CNRS et Prof. CC à l'Ecole Polytechnique), Christoph WESTBROOK (Directeur de recherche CNRS; group leader)

BEC, Quantum simulators, Atom Interferometry

[Permanent Researchers and Staff:] P. Bouyer, B. Battelier, S. Bernon, A. Bertoldi, B. Canuel. [Joint industry laboratory with iXBlue:] B. Barrett, P. Cheinet, F. Napolitano, H. Portes

Quantum images; quantum memories.

Non-equilibrium superfluids, quantum vortices, two-dimensional quantum turbulence, stochastic Gross-Piteavskii theory, c-fields.

Nonlinear waves / solitons in Bose-Einstein condensates, low-dimensional and strongly interacting quantum gases, many-body theory, dynamics of few-particle systems

Lithium, transport and dynamics

Theoretical studies on ultracold imbalanced Fermi gases.

Heron Caldas, André Mota, Lizardo Nunes, Ricardo Farias.

Complex quantum systems and nonlinear dynamics in both fermionic and bosonic ultracold quantum gases. In particular, quantum phase transitions, optical lattices, macroscopic quantum tunnelling, matter-wave solitons and vortices, the BCS-BEC crossover, and rotating systems.

Ultracold Rubidium in flexible, holographic potentials

Dr Donatella Cassettari

Xuzong Chen; Xiaoji Zhou

Fermi gas superfluidity and related physics, optical lattice and quantum simulation

Qijin Chen

Alain ASPECT (Professeur chaire Augustin Fresnel de l'IOGS, Directeur de recherche émérite CNRS), Denis BOIRON (Professeur IOGS-U.Psud), Isabelle BOUCHOULE (Chargée de recherche CNRS), Thomas BOURDEL (Chargé de recherche CNRS), Philippe BOUYER (Directeur de recherche CNRS), Marc CHENEAU (Chargé de recherche CNRS), David CLEMENT (Maitre de conférence IOGS-U.Psud), Vincent JOSSE (Maitre de conférence IOGS-U.Psud), Laurent SANCHEZ-PALENCIA (Chercheur CR au CNRS et Prof. CC à l'Ecole Polytechnique), Christoph WESTBROOK (Directeur de recherche CNRS; group leader)

Ultracold Atoms and Molecules

Bose-Einstein condensation, coherent matter-wave and quantum information rocessing metrology, and diverse research in the Electron and Optics Physics Division. See web pages for more details.

Charles Clark; William Reinhardt

Alain ASPECT (Professeur chaire Augustin Fresnel de l'IOGS, Directeur de recherche émérite CNRS), Denis BOIRON (Professeur IOGS-U.Psud), Isabelle BOUCHOULE (Chargée de recherche CNRS), Thomas BOURDEL (Chargé de recherche CNRS), Philippe BOUYER (Directeur de recherche CNRS), Marc CHENEAU (Chargé de recherche CNRS), David CLEMENT (Maitre de conférence IOGS-U.Psud), Vincent JOSSE (Maitre de conférence IOGS-U.Psud), Laurent SANCHEZ-PALENCIA (Chercheur CR au CNRS et Prof. CC à l'Ecole Polytechnique), Christoph WESTBROOK (Directeur de recherche CNRS; group leader)

Interaction of ultracold atoms and molecules with surfaces. Many-body effects in quantum sticking and scattering of ultracold atoms from surfaces.

Pam Leland

Bose-Einstein condensation with tunable interactions and two species mixtures of quantum degnerate Bose gases.

Ultrafast optics is my primary research interest. In particular, I study the interaction of ultrashort pulses of light with semiconductors. In direct-gap semiconductors, such as gallium arsenide, the coherent optical response is determined by many-body interactions among electronic carriers excited by the incident pulses.

The core of my research lies on the study of correlations in few-body atomic systems, i.e., systems with three or more atoms, at ultracold temperatures. Such systems are of fundamental importance for ultracold quantum gases, e.g., Bose-Einstein condensates and Degenerate Fermi gases. Collisions involving few atoms can determine the stability/lifetime of ultracold gases and allow for the control of the interactions in the system and the access of novel phases of the matter. Due to its extremely nonpertubative nature, few-body systems pose some of the greatest challenges facing theorists in various fields including atomic, molecular, particle and nuclear physics and chemistry. (read more)

Bose-Einstein CondensateNew optical trapsPrecision spectroscopyAtomic opticsDiffractive (holographic) optical elements

Quantum and atom optics, quantum dynamics, condensate formation, low-dimensional systems, soliton and vortex formation, simulation techniques, computational physics.

Matthew Davis

Cold molecules and precision measurement

Sidney Cahn

Ultracold molecules, atom-ion hybrid systems, fermions in lattices.

Johannes Hecker Denschlag

Atom Optics and Ultrafast Dynamics: nonlinear interactions in condensed matter physics and atomic physics of light waves, acoustic waves and matter waves, using modern laser techniques (femtosecond light pulses and laser cooling). Examples are Bose-Einstein condensation, quantum-phase transitions of ultracold atoms in optical lattices, nonlinear optics of photonic crystals, and formation of solitons.

Trapping and cooling of atoms and molecules using cryogenic buffer-gas loading.

Theoretical quantum optics and quantum information.

Molecular structure calculations of neutral and charged diatomics; photoassociation; cold collisions; coherent control of cold collisions; long-range interactions between atoms and molecules

Quantum Optics, Atomic Physics, and Quantum Dynamics

We are working on the theory of interacting many-body quantum systems far from thermal equilibrium, with a strong focus on ultracold atoms in optical lattices. However, we are also interested in other engineered quantum systems. Main interests include Floquet systems, far-from equilibrium probes, open and driven-dissipative quantum systems, the preparation and detection of topological states of matter.

André Eckardt

Theory of ultracold bosons and fermions; superfluidity; vortices; implementations of quantum logic with ultracold atoms

David Feder

Ultracold erbium atoms

Thomas Fernholz

Spontaneous creation of solitons. We use ultracold atoms at the BEC transition to explore the Kibble-Zurek mechanism by directly observing the creation of phase defects, such as solitons in elongated condensates, for temperature quenched BECs of sodium atoms. Dipolar quantum gases of NaK molecules

Gabriele Ferrari, Giacomo Lamporesi

Bose-Einstein Condensates for Atomic and Condensed Matter Physics.

Atom chips

We study the dynamical properties of quantum many-body systems ranging from cold atoms trapped in one of the coolest places in the universe – to the neutron stars where matter is compressed to such extremes that a teaspoon would weight more than a mountain. We combine medium- and high-performance computing applications, various theroetical frameworks, and experiments as analog quantum computers to understand superfluid dynamics and quantum turbulence.

Michael McNeil Forbes

Our research uses coherent, pulsed interactions and spatially-varying dipole forces, is both experimental and theoretical, and ranges from atom interferometry and quantum computation, to optical tweezers, optically-induced self-organization and cavity-mediated cooling. We also explore underpinning technologies and techniques from laser modulation, stabilization and the design and analysis of resonant enhancement cavities, to miniature pumps, atom sources and optical components for integrated atom chips, and we collaborate closely with colleagues in nanofabrication to explore the use of nanostructured surfaces for atomic manipulation.

Tim Freegarde and Matt Himsworth

BEC theory, quantum chaos, atom optics

Quantum chaos, quantum transport, optical lattices, cold atom dynamics, chaos in Bose-Einstein condensates

Our research is focused on the many-body dynamics of ultracold quantum gases far from thermal equilibrium, in particular for systems where strong correlations between the particles are important. We are applying and further developing recent substantial innovations in non-equilibrium quantum field theory for ultracold atomic gases. The functional field theory methods involve non-perturbative approximation schemes which recently have shown, by comparison with exact results, to excellently describe the far-from-equilibrium long-time dynamics of systems, even for strong interparticle forces. With this step a whole new class of phenomena can be accessed.

PD Dr. Thomas Gasenzer

MOTs & optical traps, spectroscopy, diagnostics, optical lattices, Rb87-BEC in MT, work towards all-optical BEC and towards optical Sr clock

Michal Zawada, Jerzy Zachorowski, Wlodzimierz Jastrzebski, Tomasz Brzozowski, Maria Brzozowska

Mesoscopic BECs; BEC in artificial gauge potentials

Jean Dalibard (College de France); Jérôme Beugnon (MdC UPMC); Fabrice Gerbier (CNRS)

We have been working on the following subtopics in cold atomic physics 1. Ultra cold atoms under the action of synthetic gauge field ( abelian and non-abelian): Vortices 3. Investigation in super-solid phase with ultra-cold atoms 4. Ultra cold atoms loaded a optical cavity Here are links to some recent interesting publications: Kaleidoscope image in Physical Review A, June (2012) Link:http://pra.aps.org/kaleidoscope/pra/85/6/063606 Kaleidoscope image in Physical Review A, January (2012) Link:http://pra.aps.org/kaleidoscope/pra/85/1/013642 Vortices in a supersolid See the paper in http://pra.aps.org/abstract/PRA/v82/i6/e063617 http://iopscience.iop.org/0953-4075/48/10/105301 See our recent work (with Bikash Padhi) Synthetic Landau Levels of Ultra Cold Fermions in a cavity http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.111.043603 spin-orbit coupled BEC in cavity http://journals.aps.org/pra/abstract/10.1103/PhysRevA.90.023627

Sankalpa Ghosh (PI) Former Graduate Student: Dr. Rashi Sachdeva (Ultra cold supersolid phase presence of Gauge field, currently in Okinawa Insitute of Science and Technology) Dr. Jasleen Lugani (Now in France ). Current Graduate student Inderpreet Kaur Former Master's and Undergraduate Project students : Adhip Agarwal and Madhurima Nath (2011-2012), Akshay Kumar ( 2010-2011), Gangandeep Singh and G. Bhubanesh ( 2009-2010), Sonika Johri, Kanchan Gehlot and Vishwanath Shukla (2008-2009), Chaitanya Joshi (2007-2008), Emroj Hossain (2013-2014), Bikash Padhi (2012-2014) Rahul Walia ( 2014-2015)

Quantum fluid of light, quantum simulation, nanophotonics

Cavity QED; quantum degenerate Fermi gases.

Our experiment creates dipolar Bose Einstein Condensates (BECs) of Cr atoms. In the last decade, the study of such ultracold atom gases has become an interdisciplinary and fascinating field. The realization of degenerate quantum gases opens the way to perform fundamental studies in quantum physics with an almost ideal dilute system displaying tunable properties (density, temperature, interaction strength, ...). This model system can be studied in a highly versatile environment since confining potentials can be tailored at will. Furthermore, since the analysis protocols benefit from the reliability of the laser spectroscopy techniques, the comparison between experimental outcomes and theoretical predictions is much sounder than what is usually met in condensed matter. To date the available atomic quantum gases are made of atoms interacting through isotropic short-range potentials. The long-range anisotropic dipole-dipole interaction between atoms carrying a large magnetic moment is expected to induce a wealth of new properties. For example, a supersolid phase arises when a dipolar quantum gas is transfered in a 2D lattice. The magnetic dipole moment of chromium in the ground state is 6µB. Due to this exceptionally large dipole moment, chromium degenerate gases represent ideal systems to investigate quantum dynamics under the influence of dipolar interactions. As a first stage to reach degeneracy, we set up a magneto-optical trap for the most abundant bosonic isotope 52Cr and for the fermionic isotope 53Cr. The two isotopes can be trapped separately as well as simultaneously producing a cold dipolar boson-fermion mixture. We studied the collisional properties of these cold gases. In a second stage, several millions 52Cr atoms are optically trapped at the focus of a powerful infrared laser at a temperature on the order of 100µK. Finally, we evaporatively cool the trapped 52Cr atoms down to degeneracy. We have studied the collective excitations of the chromium BEC and demonstrated the impact of the anisotropic dipole-dipole interactions on the frequencies of the low-energy collective vibration modes of the trapped BEC. In a further set of experiments, we have studied S=3-spin dynamics using our Cr-BECs either in 3D or in restricted 2D and 1D geometries. At very low magnetic fields, spontaneous demagnetization occurs which enables the study of the S=3-spinor physics. We plan to reach degeneracy for the fermionic isotope 53Cr , and to create strongly correlated systems, by extending our current experiments on the loading of our condensates into optical lattices. This will meet the current burst of interest in the statistical physics of such systems related to the field of quantum magnetism and will open new avenues for the processing of quantum information. Selected recent publications Q. Beaufils et al, All-optical Bose-Einstein Condensation of Chromium, Phys. Rev. A 77, 061601 R (2008); G. Bismut et al., Collective excitations of a dipolar BEC, Phys. Rev. Lett., 105, 040404 (2010); B. Pasquiou et al., Spin relaxation and band excitation of a dipolar BEC in 2D optical lattices, Phys. Rev. Lett. 160, 015301 (2011)

Olivier GORCEIX, Pr. (group leader), Bruno LABURTHE-TOLRA, CNRS Research Associate, Etienne MARECHAL, CNRS Engineer, Paolo PEDRI, Assistant Professor, Laurent VERNAC, Assistant Professor, Gabriel BISMUT, PhD student, Benjamin PASQUIOU, PhD student,

Research topics: Production, manipulation, and evaporative cooling of ultracold atomic beam; atom laser; Maxwell's demon ; spinor condensate

Thierry Lahaye & Renaud Mathevet

My research interests include laser stabilization and precise scan techniques using interferometry and/or heterodyne techniques, amplitude stabilization near the "photon-shot-noise" level with classical electro-optical methods, and "squeezed" beams of sub-shot-noise level or correlated photons produced in nonlinear interactions. I pursue continuous-wave approaches for application in both gravity-wave antennas and measurement of magnetically induced birefringence of the vacuum. Optical atomic clocks based on a strontium "atomic fountain" will allow "ultra-resolution" determination of linewidths < 10 Hz. A new modulation detection scheme permits cavity-enhanced nonlinear spectroscopy that provides unprecedented sensitivity (<10^-12 absorption) using molecular overtone transitions in the near-visible infrared.

Jianing Han

Andrei Sidorov, Brenton Hall, Russel McLean, David Gough, James Wang, Bryan Dalton, Tien Kieu, Peter Hannaford

J. Cooper

Atom optics. Laser cooling of atoms and molecules.

Formation and properties of ultracold molecules, both from cold atomic gases and by direct cooling. Ultracold atomic and molecular collisions. Bound states of atomic and molecular pairs, including calculations in applied fields. Interatomic and intermolecular potential energy surfaces.

Jeremy M. Hutson

BEC, Heteronuclear Fermi-Bose mixtures, Heteronuclear Bose-Bose mixtures

Chiara Fort, Francesco Minardi, Giovanni Modugno, Michele Modugno

Our research focuses on Quantum Optics, Ultra-cold physics such as optical lattices, Bose-Einstein condensation, and applications to Quantum Information Processing.

Cesium BEC, cesium magnetometer

Tadej Mežnaršič, Rok Žitko, Erik Zupanič, Peter Jeglič

Ultracold atomic mixtures

Ultracold fermions and few-body systems

Cold Atoms and Light Scattering; Coherent Backscattering, Anderson Localisation of light; Dicke super- and subradiance; Random Lasing; Levy Flights; Long Range Interactions; Quantum Optics; Cold Atoms and Astrophysics;

Robin Kaiser William Guerin

My major interest includes the development of new light sources at short wavelengths and their use to study dynamic processes in material and chemical systems. In particular, the recent development of high-energy ultrashort-pulse laser technology (in large part by the research group I co-lead with Professor Murnane) allows generation of coherent extreme-ultraviolet (EUV) and soft-X-ray bursts of femtosecond (10-15 sec) and even attosecond duration. (For comparison, the ratio of 1 femtosecond to 1 second is about the same as the ratio of 1 second to 30 million years.) The time scales probed by these light pulses correspond to those of chemical reactions and dynamic processes in semiconductors. Thus short-pulse short-wavelength light provides researchers with a unique tool to observe specific atoms, leading to a deeper understanding of the microscopic mechanisms. In recent years, our group has developed a variety of new techniques to efficiently upconvert ultrashort laser pulses coherently into the EUV and soft-X-ray regions of the spectrum. I am also a founding member of the National Science Foundation Engineering Research Center in Extreme Ultraviolet Science and Technology (http://euverc.colostate.edu/) and co-founder of a successful laser company (www.kmlabs.com).

Coherent Matter and Quantum State Manipulation in Optical Lattices.

Quantum simulations of strongly correlated electronic systems / fermionic lattice models using numerical linked-cluster expansions and quantum Monte Carlo methods

Degenerate quantum gases and atom optics

Ultracold neutral plasmas and ultracold atomic gases.

The Nonlinear Physics Centre is engaged in the fundamental research on nonlinear phenomena and nonlinear localized waves and solitons in various branches of physics. The interdisciplinary research of the group covers several topics such as nonlinear effects in bulk media and optical fibers, all-optical switching devices, nanooptics and photonic crystals, self-trapping effects and energy transfer in condensed matter physics and biopolymers, nonlinear atom optics and the dynamics of the Bose-Einstein condensates.

Dragomir N. Neshev, Anton S. Desyatnikov, Elena A. Ostrovskaya

Mixed species MOT Rb/Sr.

The goal of our research is to understand the nature of chemical reactions and find mechanisms to control chemical reactions with external radiation and electromagnetic fields.

BEC, Fermi gases, single atoms

George Batrouni (Professeur), Frédéric Hébert (Maître de Conférences), Guillaume Labeyrie (Chargé de Recherche), Christian Miniatura (Directeur de Recherche), Patrizia Vignolo (Professeur)

Studying ultracold reactions and new methods of cooling molecules and atoms

Search for permanent electron dipole moment. Yb and tungsten carbide setups.

ultracold dipolar gases; atom chips; many body cavity QED

My group uses a two-step process to prepare ultracold molecules of NH, a simple free radical. The first step, supersonic expansion, forces NH molecules through a small opening into a vacuum system, where intermolecular collisions cool the rapidly expanding gas (400 m/s) to less than 1 K. The second step uses varying electric fields (Stark deceleration) to slow the cold molecules to rest. Once the molecules are cold and stopped, we can subject them to magnetic trapping, electrostatic trapping, laser cooling, or sympathetic cooling. I plan to work with theorist John Bohn to investigate collisions of cold polar NH radicals (produced in this process) with each other and with ultracold atoms such as Rb.

Ultracold gases, Bose-Einstein condensation, optical lattices with novel band structure

Nathan Lundblad

We are a research group working in the field of ultracold quantum matter at the interface of statistical physics, atomic and molecular physics and condensed matter physics.

Tommaso Macrì

Theoretical description of nonequilibrium processes in superfluid Fermi systems: atomic nuclei and quantum gases. Concerning quantum gases we are interested in physics of BEC-BCS crossover, dynamics of superfluid vortices, quantum turbulence, hydrodynamics and viscosity. In the case of nuclear systems we are interested in large amplitude nuclear dynamics and in particular microscopic description of fission/fusion, induced fission and low energy nuclear reactions. We use mainly the following theoretical tools: Path Integral Monte Carlo approach, Density Functional Theory (static and time-dependent). Computational tools: In order to address certain questions concerning strongly interacting quantum systems one needs (super)computers. We use both CPU machines which allow for a massively parallel computing, as well as those with hybrid architecture (CPUs + GPUs).

iotr Magierski, Gabriel Wlazłowski, Janusz Oleniacz; Postdocs: Matthew Barton, Daniel Pęcak, Marek Tylutki; PhD students: Andrea Baressi, Konrad Kobuszewski, Bugra Tuzemen

Our laboratory is dedicated to the study of atomic interaction in cold trapped atom samples. In order to achieve such goal, we apply laser cooling and trapping techniques on potassium and rubidium atoms.

Luis G. Marcassa

Experimental Atomic, Molecular and Optical Physics (AMO). More specifically, interactions between highly excited "Rydberg" atoms, and between Rydberg atoms and surfaces, using laser cooling and trapping techniques. More information ...

Ultracold degenerate gases, Bose-Einstein condensation (BEC), Atom-based precision measurements, Novel quantum states

Quantum Optics of Ultracold Gases (quantum measurements, light scattering, cavity QED, optical lattices). Optically dense media, strong light-matter coupling, superradiance, polaritons

Single atoms, cavity QED, quantum transport in optical lattices, controlled coherent collisions for quantum information science

Wolfgang Alt

BEC, cold Fermi gases, optical lattices, low-dimensional systems, strongly correlated systems

We investigate the dynamics and control of ultracold atoms. Recent lines of interest are - The atom diode: one way laser barriers for atomic motion - Shortcuts to adiabaticity: methods to accelerate expansions, transport and internal state manipulations without final excitations. - Diffraction in time: a phenomenon analogous to diffraction of light but due to time-dependent obstacles and slits. It will be of increasing importance in cold atom dynamics and applications such as the atom laser, time of flight and ultrashort pulses techniques.

My research focuses on the generation and application of ultrafast light pulses of only a few cycles in duration. For this work, Prof. Kapteyn and I design and build new types of lasers and investigate new methods for optical pulse shaping and control. One application of extremely short light pulses is to use them to generate coherent X-ray beams. These femtosecond (and possibly attosecond) duration X-ray pulses can be used to study nonlinear optics in regimes not accessible with any other techniques, for holography and microscopy, or to visualize the fastest processes in chemical and material systems. At present, we have a diverse mixture of physicists, engineers, and chemical physicists in our group.

The research fields of the group are the following: creation and stability of vortices and monopoles in dilute Bose-Einstein condensates (theory), quantum information processing (exp/theory), nanoelectronics (exp/theory).

We study diverse problems in cavity-QED, quantum impurities, optomechanics, dipole-dipole interactions and quantum catastrophes.

n our research group we study the microscopic structure of ultracold quantum gases. We are especially interested in fundamental experiments in quantum atom optics, quantum simulation and quantum information processing.

Ultracold atoms in gauge fields, Mott insulators, Quench dynamics, Optical lattices

Matter-wave solitons and vortices Quantum turbulence Quantum gases with long-range interactions Multi-component condensates

dirty bosons, dipolar quantum gases, atoms in optical lattices, rotating BECs, boson-fermion mixtures, spinor Bose and Fermi gases

Hélène Perrin (CNRS)

The group works on a variety of problems in ultracold gases and quantum information.

Ben Mottelson, Christopher Pethick, Henrik Smith, Anders Sørensen

dipolar quantum gases, optical lattices, ultracold Rydberg matter, atom deposition

Tilman Pfau, Jürgen Stuhler

My recent research includes analyses of measurements and modeling of ion, fast neutral, and electron processes in low-current, low-pressure discharges and in the cathode region of glow discharges. I currently model the measured radiation from discharges in hydrogen and hydrogen-rare gas mixtures as well as develop and test heavy-particle cross-section sets for use in these and related models.

We currently have four research projects in our group. In two experiments we explore quantum metrology with ensembles of ultracold atoms and atomic vapor cells. The other two experiments investigate quantum interfaces between atoms and solid-state nanosystems such as semiconductor quantum dots and nanomechanical oscillators. We closely collaborate with other research groups in Basel, at other Swiss universities and abroad. Our activities are integrated in the NCCR Quantum Science and Technology (QSIT) and the Swiss Nanoscience Institute (SNI) and receive funding from the European Research Council (ERC).

Philipp Treutlein

Kristian Helmerson, Paul D. Lett, James Porto

Experiments: cold molecules; BEC of caesium; cold Rydberg gases and ultracold plasmas; Stark deceleration of Rydberg molecules. Theory: Control of collision dynamics by laser pulses - photoassociation; control of interactions in an atomic BEC; control of interaction in 3-body collisions - formation of triatomic molecules; electronic structures - Feshbach resonances.

Experiments: Pierre Pillet, Daniel Comparat, Nicolas Vanhaecke Theory: Mireille Aymar, Nadia Bouloufa, Anne Crubellier, Olivier Dulieu, Eliane Luc-Koenig, Françoise Masnou-Seeuws

Topics: Bose-Einstein Condensation and Quasi-Condensation Role of Density & Phase Fluctuations. Non-Equilibrium Phenomena: Applications to Atom Chips, Atom Lasers & Atom Interferometers Solitons & Vortices in Quantum Fluids: Analogies with Optical Systems Quantum Turbulence Quantum Many-Body Theories Stochastic Approaches Numerical Modelling

Theoretical Ultracold Atomic Physics

Our group utilizes laser-cooling and trapping of neutral atoms to push the boundaries of quantum control, quantum information, ultracold plasmas, and strong magnetic field physics.

BEC and Atom Optics

Ultracold atoms/ BEC/Quantum Optics and Quantum Information. Experiments and theory.

Hema Ramachandran, Andal Narayanan, R Srinivasan, Sadiqali Rangwala

Quantum mechanics on macroscopic scales using Bose-Einstein condensates.

Quantum Information and Engineering, Quantum Metrology, Atom Chips, Cavity QED

Jérôme Estève (CNRS), Jean Hare (Professor), Romain Long (MdC), Alice Sinatra (MdC), Jackob Reichel (Professor and group leader)

My main research interest is ultracold atoms and molecules loaded in optical lattices, which are periodic trapping potentials created by illuminating the atoms and molecules with laser beams. Atoms in optical lattices are analogous to electrons in solid state crystals. Their big advantage is that these "artificial crystals of light" are perfectly clean and highly controllable. Therefore, they are ideal for exploring a whole range of fundamental phenomena that are extremely difficult — or impossible — to study in traditional condensed matter systems. My goal is to study how to control and manipulate these systems to engineer different quantum phases such as superfluids, insulators, quantum magnets, and topological matter. I plan to use them for understanding the physics of strongly correlated bosonic and fermionic systems and nonequilibrium phenomena. Additionally, I am interested in studying how to generate and manipulate entanglement in quantum systems for use in quantum information processing and precision measurements.

Storage rings for BECs. Beginning a Ca BEC experiment.

Aidan Arnold, Erling Riis

Halina Rubinsztein-Dunlop, Norman Hekenberg, Erik van Ooijen, Matthew Davis, Cathy Holmes, Gerald Milburn, Simon Haine

Our current experiment is on condensate interferometry using 87Rb atoms. We are using a specially designed magnetic waveguide that we hope will permit interferometry with very long interaction times, up to 1 s or more.

quantum computing, Rydberg atoms, spatial instabilities

The research activity of our group is focused on the investigation of degenerate quantum gases by using the methods of statistical mechanics and thermal field theory. We study the thermodynamics of weakly-interacting Bose and Fermi superfluids (alkali-metal atoms like rubidium, sodium and lithium, but also atomic hydrogen) trapped in magnetic or magneto-optical traps. We analyze single-particle and collective elementary excitations by numerically solving both Bologliubov-de Gennes and Popov equations. Moreover, we investigate dynamical properties of Bose-Einstein condensates by using the time-dependent 3D Gross-Pitaevskii equation, which describes the macroscopic wave-function (order parameter) of the Bose condensate. Presently we are investigating the dynamics (collective excitations and free expansion) of a two-component Fermi gas in the BCS-BEC crossover and the formation of solitons in atomic mixtures of bosons and fermions. In particular, we are developing a reliable density functional for the unitary Fermi gas (infinite scattering length) at zero and finite teperature. We are planning to start the analysis of the condensate properties of p-wave Fermi atoms and d-wave superconductors in the BCS-BEC crossover both in two and three dimensions. Moreover, we are working on the many-body quantum tunneling dynamics of spin-polarized fermions in a double-well potential.

Luca Salasnich, Francesco Ancilotto, Flavio Toigo

F. Chevy

The group conducts theoretical research on correlated quantum systems. In regimes of parameters where matter and fields are governed by the laws of quantum physics, the interplay of quantum interference and particle interactions gives rise to fascinating phenomena, such as Bose-Einstein condensation, Fermi degeneracy, superfluidity, superconductivity, entanglement, and quantum phase transitions for instance. In the group, our main efforts focus on the physics of systems that constitute promising platforms for concrete realization of quantum technologies. Together with other systems in condensed matter and quantum optics, ultracold atoms have already produced milestone results, which turn quantum technologies from dream to reality. In the recent years quantum simulation has established itself at the interface of experiments and theory. Hence most of the recent dramatic advances on quantum simulations own much to parallel experimental and theoretical developments. In the group, we work along three main lines:     Propose new protocols for quantum simulation;     Elaborate relevant models to interpret and understand simulation results;     Develop new theoretical approaches for correlated quantum systems. In this view, we develop both analytical approaches (field theories, mean field approximation, bosonization, ...) and numerical techniques (nonlinear Schrödinger equation, path integral quantum Monte Carlo, variational Monte Carlo, exact diagonalization, static and dynamics DMRG, ...). The main part of our work is purely theoretical but we also have long-term collaborations with experimental groups

The Scalettar group does Quantum Monte Carlo simulations of strongly interacting bosonic and fermionic systems, with the goal of extracting the charge, spin, and pairing correlations.

Our group uses numerical methods to examine strongly correlated quantum phases of matter. Our recent work has examined novel phases of interacting bosons and fermions in optical lattices.

Using the recently developed techniques of quantum gas microscopy, Peter Schauss is working on quantum simulation of bosonic and fermionic quantum many-body systems with ultracold atoms in optical lattices. The single-site and single-atom resolved imaging of these systems enables a new view on strongly correlated condensed-matter-like systems with full tunability of all relevant parameters of the Hamiltonian, reaching into regimes where exact calculations on classical computers become inaccessible.

The group explores several complementary aspects of ultracold physics. The electronic structure and quantum dynamics of ultracold Rydberg atoms and molecules including their dressing in light fields and the coherent excitation dynamics in multi-trap arrays represents one focus. To develop a deep understanding of the mechanisms of quantum and in particular tunneling dynamics is our goal in case of strongly correlated bosons in low-dimensional traps including optical lattices and waveguides. Ultracold scattering in low-dimensions leads to novel interaction properties of atoms with an immediate impact on the corresponding many-body systems. Confinement-induced resonances and molecules formation as well as confinement-induced transparency are examples. We study nonlinear excitations of Bose-Einstein condensates such as solitons and vortices including their stability, structure and dynamics. Formation of ultracold molecules and steering their dynamics via external electric fields such as quantum control of photoassociation processes open the door to a quantum state selective chemical reactions dynamics.

Atom chips

BEC, optical lattices

Thorium

V. M. Baev, K. Bongs

ultracold Rydberg gases (Cs and Rb), atom chips

James Shaffer

We are a quantum gas experimental group at Seoul National University.

I am presently interested in quantum plasmonics - particularly interaction of atoms with plasmonic cavities and its applications towards quantum computing.

Potential energy surfaces for ultracold atom-molecule dynamics.

Novel macroscopic and mesoscopic quantum systems using ultra-cold atoms.

BEC of 87Rb -- interaction with optical barriers, and (eventually) measurements on atoms while tunneling through optical barriers. Optical lattices for quantum information (tomography of COM states, and pulse echoes) and coherent control / quantum chaos.

Alan Stummer

Calcium BEC and Photassociation, Ultrastable Lasers

Theoretical research on the various phenomena related to Bose-Einstein condensation and to the physics of cold atomic gases in traps. Rotating quantum gases, Low dimensions, Excitations in Bose-Einstein condensates, Ultracold atoms in optical lattices, Ultracold Fermi gases, Quantum Monte Carlo methods, Casimir-Polder force, Quantum optics and solid state physics, Quantum information processing, Matter-waves interferometry.

Sandro Stringari, Lev P. Pitaevskii, Franco Dalfovo, Stefano Giorgini, Augusto Smerzi, Tommaso Calarco, Iacopo Carusotto, Chiara Menotti, Alessio Recati.

Ultracold Molecules and Rydberg Atoms

The main focus of our research is quantum information, but we also do some work on ultra cold atoms. In general most of our research can be described as quantum state engineering. One of the unique features of quantum optical systems is the extremely good experimental control over the systems, down to the level of controlling individual atoms and ions. In our research we develop theories for how one can use this extremely good experimental control to realize interesting physical effects. In particular we have developed theories for how one can realize quantum computers and for interesting effects, which can be realized with ultra cold atoms.

Laser Cooling of Yb.

Isotopic potassium mixtures

In the field ultracold atoms, our current research focuses on the BEC-BCS transition in Fermi superfluid, imbalanced Fermi superfluids, quantum gases in 2D, optical lattices, skyrmions, and research on polariton condensates.

Prof.dr.Jacques Tempere, prof.dr.Michiel Wouters, dr. Sergei Klimin

My research focuses on understanding the interface between ultracold atoms and quantum optics - an understanding I plan to apply to the field of precision measurement. I am presently devising strategies to reduce the effect of the fundamental quantum noise that arises from Heisenberg's uncertainty relationship as applied to atomic spins. In one project, I work on non-destructively measuring and canceling out the quantum fluctuations in the collective spin state of an ensemble of laser-cooled 87Rb atoms in a high-finesse optical cavity. By learning how to minimize the effect of quantum noise in this type of system, I hope to advance the precise measurements required for atomic clocks and in searches for permanent electric dipole moments in atoms and molecules.

Atomic and Molecular Physics, Laser Cooling, Physics with Cold Atoms, Cold Alkaline Earth Atoms, Atomic Clocks

Quantum Degenerate Bose and Fermi gases. Microfabricated magnetic traps.

Alan Stummer

Cold atom interferometry: fundamental tests and applications; Sr experiment: ultracold atoms and optical clocks

We are an interdisciplinary group of theoretical physicists and chemists located at the Faculty of Physics of the University of Warsaw. We are a part of the Department of Modeling Complex Systems at the Institute of Theoretical Physics. We are also a part of Centre for Atomic Molecular and Optical Physics.We work on the intersection of theoretical atomic, molecular, and optical (AMO) physics and quantum chemistry. We are primary interested in engineering novel controllable quantum molecular systems for both fundamental research and upcoming quantum technologies.

Michał Tomza

Ultracold Fermi gases

Secialized in condensate collisions, nonlinear atom opics, quantum optics and Josephson effects

Zbigniew, Idziaszek, Pawel Zin, Jan Chwedenczuk, Eryk Infeld

Robert Dall

Experimental study of quantum vacuum: the effects of quantum vacuum on matter employing ultra-cold atoms and torsion balances; quantum dynamics of single atoms or a few number of atoms trapped in optical lattices and near optical cavities.

Chris Vale, Peter Hannaford, Wayne Rowlands, Michael Mark, Chris Ticknor, Mark Kivenen

W-SLDA ToolkitSelf-consistent solver of mathematical problems which have structure formally equivalent to Bogoliubov-de Gennes equations. The toolkit allows for simulating fermionic superfluids like ultracold atomic gases. Both static and time-depend phenomena can be investigated by means of W-SLDA. The software is optimized towards simulations of large systems, consisting of thousands of particles.W-SLDA Toolkit is designed to solve problems related to fermionic superfluidity. Particularly it is well suited to study static and dynamic properties of ultracold Fermi gases across BCS - BEC crossover. W-SLDA Toolkit implements functionals for reliable studies of systems being in weakly interacting BCS regime (BdG functional) and in the strongly interacting regime, called unitary Fermi gas (SLDA functional).W-SLDA Toolkit allows for studies of the system properties as a function of:interaction strength askF,system dimensionality (1D, 2D, 3D),population imbalance,mass imbalance,temperature.For full list of functionalities see here.

Project leader: Gabriel Wlazłowski; Theory expertise: Aurel Bulgac, Piotr Magierski, Michael McNeil Forbes; HPC expertise: Kenneth J. Roche, Maciej Marchwiany;

Quantum gases

BEC mixture and ultracold polar molecules

Ultracold LiCs mixtures, Rydberg atoms and MOTRIMS

Rydberg atoms, polar molecules, dissipative quantum many-body physics, quantum information

BEC, optical lattices, reduced dimensions, quantum computing, precision measurements

Alain ASPECT (Professeur chaire Augustin Fresnel de l'IOGS, Directeur de recherche émérite CNRS), Denis BOIRON (Professeur IOGS-U.Psud), Isabelle BOUCHOULE (Chargée de recherche CNRS), Thomas BOURDEL (Chargé de recherche CNRS), Philippe BOUYER (Directeur de recherche CNRS), Marc CHENEAU (Chargé de recherche CNRS), David CLEMENT (Maitre de conférence IOGS-U.Psud), Vincent JOSSE (Maitre de conférence IOGS-U.Psud), Laurent SANCHEZ-PALENCIA (Chercheur CR au CNRS et Prof. CC à l'Ecole Polytechnique), Christoph WESTBROOK (Directeur de recherche CNRS; group leader)

Experimental activity on ultracold Strontium gas Fields of interest: Non Abelian gauge field, Nuclear spin dynamics, Long-range force, Coherent processes in random media.

David Wilkowski

Non-equilibrium dynamics of complex quantum systems, focus on ultra cold gases, highly excited Rydberg atoms, opto-mechanical devices and hybrid assemblies of these. Our main interest are quantum simulations for transport phenomena, biological transport and quantum chemistry.

Sebastian Wüster

My main research interests include ultrasensitive laser spectroscopy, optical frequency metrology, and quantum optics using cold atoms. My group is exploring molecular dynamics using exquisitely sensitive absorption-measurement techniques developed in JILA. We also use high-sensitivity techniques to define ultrastable optical frequency standards, currently being explored for their use in metrology, communications, and high-precision measurements such as in NASA's space-borne interferometers. The use of ultrafast lasers has revolutionized the field of optical frequency metrology, and we are actively pursuing research related to the concept and application of this novel field. We are also exploring cold atoms and molecules for their use in high-precision measurement and quantum optics.

We concentrate on modelling cold quantum gases physics in traps and optical lattices with current interests involving orbital physics, excitations in many body systems, finite temperature effects, dynamics and approach towards equilibrium. Effects induced by disorder are also of prime importance.

Jakub Zakrzewski, Krzysztof Sacha

Quantum Degenerate 87Rb Bose and 40K Fermi gases.

Degenerate quantum gases (including transport, spin-orbit coupling) and strongly correlated electronic systems

H. G. Embacher, H. Ritsch

- To explore the unprecedented potential of matter-wave interferometry - To look at (de)coherence in increasingly complex quantum systems.BEC 1: We are interested in guided matter-wave interferometer. Our matter-waves are made from Bose-Einstein Condensates (BEC).BEC 2 is aimed at atom lasers, how to make them brighter and at the coherence of atom laser beams.

Dr. Wolf von Klitzing