Instability of holographic superfluids in optical lattice

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Yang , P , Li , X & Tian , Y 2021 , ' Instability of holographic superfluids in optical lattice ' , Journal of High Energy Physics , no. 11 , 190 .

Title: Instability of holographic superfluids in optical lattice
Author: Yang, Peng; Li, Xin; Tian, Yu
Contributor organization: Department of Physics
Date: 2021-11-25
Language: eng
Number of pages: 20
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
Abstract: The instability of superfluids in optical lattice has been investigated using the holographic model. The static and steady flow solutions are numerically obtained from the static equations of motion and the solutions are described as Bloch waves with different Bloch wave vector k. Based on these Bloch waves, the instability is investigated at two levels. At the linear perturbation level, we show that there is a critical k(c) above which the superflow is unstable. At the fully nonlinear level, the intermediate state and final state of unstable superflow are identified through numerical simulation of the full equations of motion. The results show that during the time evolution, the unstable superflow will undergo a chaotic state with soliton generation. The system will settle down to a stable state with k < k(c) eventually, with a smaller current and a larger condensate.
Subject: Holography and condensed matter physics (AdS/CMT)
AdS-CFT Correspondence
Gauge-gravity correspondence
114 Physical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion

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