Quantum entropic self-localization with ultracold fermions
Abstract
We study a driven, spin-orbit coupled fermionic system in a lattice at the resonant regime where the drive frequency equals the Hubbard repulsion, for which non-trivial constrained dynamics emerge at fast timescales. An effective density-dependent tunneling model is derived, and examined in the sparse filling regime in 1D. The system exhibits entropic self-localization, where while even numbers of atoms propagate ballistically, odd numbers form localized bound states induced by an effective attraction from a higher configurational entropy. These phenomena occur in the strong coupling limit where interactions only impose a constraint with no explicit Hamiltonian term. We show how the constrained dynamics lead to quantum few-body scars and map to an Anderson impurity model with an additional intriguing feature of non-reciprocal scattering. Connections to many-body scars and localization are also discussed.
Keywords
Cite
@article{arxiv.1905.12094,
title = {Quantum entropic self-localization with ultracold fermions},
author = {Mikhail Mamaev and Itamar Kimchi and Michael A. Perlin and Rahul M. Nandkishore and Ana Maria Rey},
journal= {arXiv preprint arXiv:1905.12094},
year = {2019}
}
Comments
6+7 pages, 4+3 figures