Two-dimensional dynamics of expansion of a degenerate Bose gas

Abstract

Expansion of a degenerate Bose gas released from a pancakelike trap is numerically simulated under the assumption of separation of the motion in the plane of the loose initial trapping and the motion in the direction of the initial tight trapping. The initial conditions for the phase fluctuations are generated using the extension to the two-dimensional case of the description of the phase noise by the Ornstein-Uhlenbeck stochastic process. The numerical simulations, taking into account both the finite size of the two-dimensional system and the atomic interactions, which cannot be neglected on the early stage of expansion, did not reproduce the scaling law for the peaks in the density fluctuation spectra experimentally observed by Choi, Seo, Kwon, and Shin [Phys. Rev. Lett. 109, 125301 (2012)]. The latter experimental results may thus require an explanation beyond our current assumptions.

4 pages, 2 figures, revtex4

References in corpus (22)

• Weakly bound dimers of fermionic atoms
• Extension of Bogoliubov theory to quasi-condensates
• Exact Relations for a Strongly-interacting Fermi Gas from the Operator Product Expansion
• Evidence for Universal Four-Body States Tied to an Efimov Trimer
• Universal Properties of the Four-Body System with Large Scattering Length
• Bragg spectroscopy of a strongly interacting 85Rb Bose-Einstein condensate
• Number of closed-channel molecules in the BEC-BCS crossover
• Universal Properties of the Ultra-Cold Fermi Gas
• Virial expansion for a strongly correlated Fermi gas
• Radio Frequency Association of Efimov Trimers
• Efimov Physics in Cold Atoms
• Universal Relations for Identical Bosons from 3-Body Physics
• Exact Relations for a Strongly-interacting Fermi Gas near a Feshbach Resonance
• Diatomic molecules in ultracold Fermi gases - Novel composite bosons
• Three attractively interacting fermions in a harmonic trap: Exact solution, ferromagnetism, and high-temperature thermodynamics
• Efimov physics in bosonic atom-trimer scattering
• Virial theorems for trapped cold atoms
• Resonant Scattering of Ultracold Atoms in Low Dimensions
• Single-Particle Momentum Distribution of an Efimov trimer
• Three fermions in a box at the unitary limit: universality in a lattice model
• Crossover in the Efimov spectrum
• Short Range Scaling Laws of Quantum Gases With Contact Interactions

Cited by in corpus (64)

• Comparing and contrasting nuclei and cold atomic gases
• Two and Three-body Contacts in the Unitary Bose Gas
• Generalized Hydrodynamics in the 1D Bose gas: theory and experiments
• Universal Scaling Laws in the Dynamics of a Homogeneous Unitary Bose Gas
• Breakdown of Tan's relation in lossy one-dimensional Bose gases
• Strongly correlated Bose gases
• Lindblad Equation for the Inelastic Loss of Ultracold Atoms
• Large-momentum distribution of a polarized Fermi gas and p-wave contacts
• Field-theoretical aspects of one-dimensional Bose and Fermi gases with contact interactions
• Ground-state properties of unitary bosons: from clusters to matter
• Bose-Einstein condensation of Efimovian triples in the unitary Bose gas
• Universal Tan relations for quantum gases in one dimension
• Comparative study of one-dimensional Bose and Fermi gases with contact interactions from the viewpoint of universal relations for correlation functions
• Mass-imbalanced Three-Body Systems in Two Dimensions
• Critical behaviours of contact near phase transitions
• Correlation functions of one-dimensional strongly interacting two-component gases
• Effective-range dependence of resonant Fermi gases
• Few-body correlations in two-dimensional Bose and Fermi ultracold mixtures
• Pattern formation in one-dimensional polaron systems and temporal orthogonality catastrophe
• Bunching, clustering, and the buildup of few-body correlations in a quenched unitary Bose gas
• Excitation picture of an interacting Bose gas
• 2D dilute Bose mixture at low temperatures
• Dimensional Effects on the Momentum distribution of Bosonic Trimer States
• Universal and non-universal effective $N$-body interactions for ultracold harmonically-trapped few-atom systems
• Dynamical fermionization in a one-dimensional Bose-Fermi mixture
• Emergent s-wave interactions between identical fermions in quasi-one-dimensional geometries
• Tan's contact as an indicator of completeness and self-consistency of a theory
• Quantum critical behavior and thermodynamics of the repulsive one-dimensional Hubbard model in a magnetic field
• Shear viscosity and spin sum rules in strongly interacting Fermi gases
• P-wave contacts of quantum gases in quasi-one-dimensional and quasi-two-dimensional traps
• High-momentum oscillating tails of strongly interacting 1D gases in a box
• Symmetry oscillations in strongly interacting one-dimensional mixtures
• Thermal fading of the $1/k^4$-tail of the momentum distribution induced by the hole anomaly
• On the survival of the quantum depletion of a condensate after release from a magnetic trap
• Dynamical excitation processes and correlations of three-body two-dimensional mixtures
• Critical behavior of Tan's contact for bosonic systems with a fixed chemical potential
• Non-relativistic trace anomaly and equation of state in dense fermionic matter
• Bound states of a light atom and two heavy dipoles in two dimensions
• Evolution of the unitary Bose gas for broad to narrow Feshbach resonances
• Emergent $s$-wave interactions in orbitally active quasi-two-dimensional Fermi gases
• Resonance triplet dynamics in the quenched unitary Bose gas
• Three-body contact for fermions. I. General relations
• Structural properties of bosonic He clusters with N=2-10 for different potential models at the physical point and at unitarity
• Synergy between deep neural networks and the variational Monte Carlo method for small ${}^{4}H{e}_N$ clusters
• Tan's adiabatic sweep theorem from the variational theorem for the scattering length
• Nuclear three-body short-range correlations in coordinate space
• Quantum Monte Carlo studies of a trimer scaling function with microscopic two- and three-body interactions
• Efimov Effect in Long-range Quantum Spin Chains
• Strong-coupling RPA theory of a Bose gas near the superfluid--Mott-insulator transition: universal thermodynamics and two-body contact
• Reflections on dipolar quantum fluids
• Exact Thermodynamics For Weakly Interacting Normal-Phase Quantum Gases: Equations of State For All Partial Waves
• How to measure the free energy and partition function from atom-atom correlations
• Universal Relations for Fermions with Large Scattering Length
• Two-Body Contact Dynamics in a Bose Gas near a Fano-Feshbach Resonance
• Hybrid-pair superfluidity in a strongly driven Fermi gas
• Two-body contact of a Bose gas near the superfluid--Mott-insulator transition
• Losses in interacting quantum gases: ultra-violet divergence and its regularization
• The role of the effective range in strongly-interacting few-body systems
• Adiabatic sweep theorem for three-dimensional dipolar Bose gases
• The variational theorem for the scattering length in low dimensions and its applications to universal systems
• Equivalence of dissipative and dissipationless dynamics of interacting quantum systems with its application to the unitary Fermi gas
• Probing non-Gaussian correlations through entanglement generation in a many-body quantum system
• Interaction quenches in Bose gases studied with a time-dependent hypernetted-chain Euler-Lagrange method
• Ab initio study of the neutron and Fermi polarons on the lattice