Fermi-to-Bose crossover in a trapped quasi-2D gas of fermionic atoms
arXiv:1702.04145 · doi:10.1088/1361-648X/aa7ad9
Abstract
Physics of many-body systems where particles are restricted to move in two spatial dimensions is challenging and even controversial: On one hand, neither long-range order nor Bose condensation may appear in infinite uniform 2D systems at finite temperature, on the other hand this does not prohibit superfluidity or superconductivity. Moreover, 2D superconductors, such as cuprates, are among the systems with highest critical temperatures. Ultracold atoms are a platform for studying 2D physics. Uniquely to other physical systems, quantum statistics may be completely changed in an ultracold gas: an atomic Fermi gas may be smoothly crossed over into a gas of Bose molecules (or dimers) by tuning interatomic interactions. We review recent experiments where such crossover has been demonstrated as well as critical phenomena in the Fermi-to-Bose crossover. We also present simple theoretical models describing the gas at different points of the crossover and compare the data to these and more advanced models.
Review for J. Phys.: Cond. Matt
References in corpus (22)
- Many-Body Physics with Ultracold Gases
- Theory of ultracold Fermi gases
- Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
- Weakly bound dimers of fermionic atoms
- Collective excitations of a degenerate gas at the BEC-BCS crossover
- Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
- Phase diagram of a two-component Fermi gas with resonant interactions
- Radiofrequency spectroscopy of a strongly interacting two-dimensional Fermi gas
- Observation of a two-dimensional Fermi gas of atoms
- Observation of the Berezinskii-Kosterlitz-Thouless Phase Transition in an Ultracold Fermi Gas
- Observation of pair condensation in the quasi-2D BEC-BCS crossover
- Cooling and thermometry of atomic Fermi gases
- p-wave triggered superconductivity in single layer graphene on an electron-doped oxide superconductor
- Spin-Imbalanced Quasi-Two-Dimensional Fermi Gases
- Exact few-body results for strongly correlated quantum gases in two dimensions
- Apparent low-energy scale invariance in two-dimensional Fermi gases
- Pairing effects in the normal phase of a two-dimensional Fermi gas
- Breathing mode of two-dimensional atomic Fermi gases in harmonic traps
- Composite bosons in the 2D BCS-BEC crossover from Gaussian fluctuations
- Pressure profiles of nonuniform two-dimensional atomic Fermi gases
- Superfluid Fermi liquid in a unitary regime
- Quantum fluctuations and vortex-antivortex unbinding in the 2D BCS-BEC crossover
Cited by in corpus (22)
- An ideal Josephson junction in an ultracold two-dimensional Fermi gas
- Sound propagation and quantum limited damping in a two-dimensional Fermi gas
- Observation of superfluidity in a strongly correlated two-dimensional Fermi gas
- Reduced quantum anomaly in a quasi-2D Fermi superfluid: The significance of the confinement-induced effective range of interactions
- Fermi-Bose mixtures and BCS-BEC crossover in high-Tc superconductors
- Superfluid density and critical velocity near the fermionic Berezinskii-Kosterlitz-Thouless transition
- Josephson junction dynamics in a two-dimensional ultracold Bose gas
- Collective modes of a two-dimensional Fermi gas at finite temperature
- Precision Many-Body Study of the Berezinskii-Kosterlitz-Thouless Transition and Temperature-Dependent Properties in the Two-Dimensional Fermi Gas
- Collective modes and superfluidity of a two-dimensional ultracold Bose gas
- Few-body perspective of a quantum anomaly in two-dimensional Fermi gases
- Effective theory for ultracold strongly interacting fermionic atoms in two dimensions
- Breathing mode frequency of a strongly interacting Fermi gas across the 2D-3D dimensional crossover
- Chiral twodimensional p-wave superfluid from s-wave pairing in the BEC regime
- Polariton-polariton interaction beyond the Born approximation: A toy model study
- Effective potential and quantum criticality for imbalanced Fermi mixtures
- Formation of droplets of the order parameter and superconductivity in inhomogeneous Fermi-Bose mixtures (Brief review)
- Role of the confinement-induced effective range on the thermodynamics of a strongly correlated Fermi gas in two dimensions
- Coexistence of topological and nontopological Fermi-superfluid phases
- Dynamical BCS theory of a two-dimensional attractive Fermi gas: effective interactions from Quantum Monte Carlo calculations
- Hybridization of the amplitude mode in a confined fermionic superfluid
- Non-universal Fermi polaron in quasi two-dimensional quantum gases