Chaos assisted many-body tunnelling
Quantum Gases
2022-11-09 v1 Chaotic Dynamics
Quantum Physics
Abstract
We study the interplay of chaos and tunnelling between two weakly-coupled Bose-Josephson junctions. The classical phase space of the composite system has a mixed structure including quasi-integrable self-trapping islands for particles and excitations, separated by a chaotic sea. We show that the many-body dynamical tunnelling gap between macroscopic Schr\"odinger cat states supported by these islands is chaos-enhanced. The many-body tunnelling rate fluctuates over several orders of magnitude with small variations of the system parameters or the particle number.
Keywords
Cite
@article{arxiv.2206.09371,
title = {Chaos assisted many-body tunnelling},
author = {Urbashi Satpathi and Sayak Ray and Amichay Vardi},
journal= {arXiv preprint arXiv:2206.09371},
year = {2022}
}
Comments
Includes Supplemental Material