Chaos, metastability and ergodicity in Bose-Hubbard superfluid circuits

The hallmark of superfluidity is the appearance of metastable flow-states that carry a persistent circulating current. Considering Bose-Hubbard superfluid rings, we clarify the role of “quantum chaos” in this context. We show that the standard Landau and Bogoliubov superfluidity criteria fail for su...

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Bibliographic Details
Main Authors: Arwas, Geva, Cohen, Doron
Format: Conference Proceeding
Language:English
Subjects:
Circuits
Fluids
Superfluidity
Online Access:Get full text
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Summary:The hallmark of superfluidity is the appearance of metastable flow-states that carry a persistent circulating current. Considering Bose-Hubbard superfluid rings, we clarify the role of “quantum chaos” in this context. We show that the standard Landau and Bogoliubov superfluidity criteria fail for such low-dimensional circuits. We also discuss the feasibility for a coherent operation of a SQUID-like setup. Finally, we address the manifestation of the strong many-body dynamical localization effect.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5016126