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arXiv · 1308.5860

Triangular Bose-Hubbard trimer as a minimal model for a superfluid circuit

Geva Arwas·Amichay Vardi·Doron Cohen
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Abstract

The triangular Bose-Hubbard trimer is topologically the minimal model for a BEC superfluid circuit. As a dynamical system of two coupled freedoms it has mixed phase-space with chaotic dynamics. We employ a semiclassical perspective to study triangular trimer physics beyond the conventional picture of the superfluid-to-insulator transition. From the analysis of the Peierls-Nabarro energy landscape, we deduce the various regimes in the $(Ω,u)$ parameter-space, where $u$ is the interaction, and $Ω$ is the superfluid rotation-velocity. We thus characterize the superfluid-stability and chaoticity of the many-body eigenstates throughout the Hilbert space.

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Geva Arwas, Amichay Vardi, Doron Cohen. 2014-01-07. Triangular Bose-Hubbard trimer as a minimal model for a superfluid circuit. https://doi.org/10.1103/physreva.89.013601

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