Coherent backscattering in the Fock space of ultracold bosonic atoms
arXiv:1610.04350 · doi:10.1002/andp.201600311
Abstract
We present numerical evidence for the occurrence of coherent backscattering in the Fock space of a small disordered Bose-Hubbard system consisting of four sites and containing five particles. This many-body interference phenomenon can most conveniently be seen in time evolution processes that start from a Fock state of the Bose-Hubbard system. It manifests itself in an enhanced detection probability of this initial state as compared to other Fock states with comparable total energy. We argue that coherent backscattering in Fock space can be experimentally measured with ultracold bosonic atoms in optical lattices using state-of-the-art single-site detection techniques. A synthetic gauge field can be induced in order to break time-reversal symmetry within the lattice and thereby destroy coherent backscattering. While this many-body interference effect is most prominently visible in the presence of eigenstate thermalization, we briefly discuss its significance in the opposite regime of many-body localization.
7 pages, 4 figures
References in corpus (17)
- Thermalization and its mechanism for generic isolated quantum systems
- Many body localization and thermalization in quantum statistical mechanics
- Localization of interacting fermions at high temperature
- Direct observation of Anderson localization of matter-waves in a controlled disorder
- Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
- Quantum thermalization through entanglement in an isolated many-body system
- Exploring the many-body localization transition in two dimensions
- Many body localization in Heisenberg XXZ magnet in a random field
- Destruction of Anderson localization by a weak nonlinearity
- Realistic Time-Reversal Invariant Topological Insulators With Neutral Atoms
- Engineering Time-Reversal Invariant Topological Insulators With Ultra-Cold Atoms
- Universal spreading of wavepackets in disordered nonlinear systems
- Absence of Wavepacket Diffusion in Disordered Nonlinear Systems
- Coherent Backscattering of Ultracold Atoms
- The semiclassical propagator in fermionic Fock space
- Echo spectroscopy of Anderson localization
- The semiclassical propagator in Fock space: dynamical echo and many-body interference