Entangled Dynamics in Macroscopic Quantum Tunneling of Bose-Einstein Condensates

2016/05/18 by Diego A. Alcala, Joseph Glick, Joseph A. Glick +1
Physics and Astronomy · #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Entropy (arrow of time) #Physics #Quadratic growth #Quantum #Quantum entanglement #Quantum many-body systems #Quantum mechanics #Quantum tunnelling #Quantum, superfluid, helium dynamics #cond-mat.quant-gas

paper · pdf · doi:10.1103/physrevlett.118.210403

published as Phys. Rev. Lett. 118, 210403 (2017) · 5 pages, 5 figures. arXiv admin note: text overlap with arXiv:1105.5164

arxiv created 2016/05/18 · openalex publication_date 2017/05/25 · arxiv updated 2017/05/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

Tunneling of a quasibound state is a nonsmooth process in the entangled many-body case. Using time-evolving block decimation, we show that repulsive (attractive) interactions speed up (slow down) tunneling. While the escape time scales exponentially with small interactions, the maximization time of the von Neumann entanglement entropy between the remaining quasibound and escaped atoms scales quadratically. Stronger interactions require higher-order corrections. Entanglement entropy is maximized when about half the atoms have escaped.

Citations

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