Breakdown of integrability in a quasi-1D ultracold bosonic gas.

  title={Breakdown of integrability in a quasi-1D ultracold bosonic gas.},
  author={Igor E. Mazets and Thorsten Schumm and J{\"o}rg Schmiedmayer},
  journal={Physical review letters},
  volume={100 21},
We demonstrate that virtual excitations of higher radial modes in an atomic Bose gas in a tightly confining waveguide result in effective three-body collisions that violate integrability in this quasi-one-dimensional quantum system and give rise to thermalization. The estimated thermalization rates are consistent with recent experimental results in quasi-1D dynamics of ultracold atoms. 

Figures from this paper

Quantum gray solitons in confining potentials.
It is shown that, for a large number of trapped atoms, most of the Lieb II levels can be experimentally resolved.
Dynamics and kinetics of quasiparticle decay in a nearly-one-dimensional degenerate Bose gas
We consider decay of a quasiparticle in a nearly-one-dimensional quasicondensate of trapped atoms, where virtual excitations of transverse modes break down one-dimensionality and integrability,
Integrability breakdown in longitudinaly trapped, one-dimensional bosonic gases
Abstract A system of identical bosons with short-range (contact) interactions is studied. Their motion is confined to one dimension by a tight lateral trapping potential and, additionally, subject to
Pure confinement-induced trimer in one-dimensional atomic waveguides
Shallow trimers composed of three bosonic atoms in one-dimensional harmonic waveguides are studied in the vicinity of a Feshbach resonance. It is shown that for arbitrarily large values of the
Three-body pseudopotential for atoms confined in one dimension
Following a strong analogy with two-dimensional physics, the three-body pseudo-potential in one dimension is derived. The Born approximation is then considered in the context of ultracold atoms in a
Prethermalization of weakly interacting bosons after a sudden interaction quench
We calculate the dynamics of local and non-local correlation functions of a three dimensional weakly interacting Bose gas after an interaction quench. Within the Bogoliubov approximation we discuss
Restricted thermalization for two interacting atoms in a multimode harmonic waveguide
In this article, we study the thermalizability of a system consisting of two atoms in a circular, transversely harmonic waveguide in the multimode regime. While showing some signatures of
Thermalization in a quasi-one-dimensional ultracold bosonic gas
We study the collisional processes that can lead to thermalization in one-dimensional (1D) systems. For two-body collisions, excitations of transverse modes are the prerequisite for energy exchange
Prethermalization and universal dynamics in near-integrable quantum systems
We review the recent progress in the understanding of the relaxation of isolated near-integrable quantum many-body systems. Focusing on prethermalization and universal dynamics following a quench, we
Prethermalization in one-dimensional Bose gases: Description by a stochastic Ornstein-Uhlenbeck process
We experimentally study the relaxation dynamics of a coherently split one-dimensional Bose gas using matterwave interference. Measuring the full probability distributions of interference contrast