Chaos-assisted many-body tunnelling

Urbashi Satpathi; Sayak Ray; Amichay Vardi

doi:10.1103/PhysRevE.106.L042204

Chaos-assisted many-body tunnelling

Urbashi Satpathi, Sayak Ray, Amichay Vardi

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We study the interplay of chaos and tunneling 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 tunneling gap between macroscopic Schrödinger cat states supported by these islands is chaos-enhanced. The many-body tunneling rate fluctuates over several orders of magnitude with small variations of the system parameters or the particle number.

Original language	English
Article number	L042204
Journal	Physical Review E
Volume	106
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevE.106.L042204
State	Published - 1 Oct 2022

ASJC Scopus subject areas

Statistical and Nonlinear Physics
Statistics and Probability
Condensed Matter Physics

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10.1103/PhysRevE.106.L042204

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AB - We study the interplay of chaos and tunneling 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 tunneling gap between macroscopic Schrödinger cat states supported by these islands is chaos-enhanced. The many-body tunneling rate fluctuates over several orders of magnitude with small variations of the system parameters or the particle number.

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Chaos-assisted many-body tunnelling

Abstract

ASJC Scopus subject areas

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