Entanglement and exotic superfluidity in spin-imbalanced lattices

V.V. França

Physica A: Statistical Mechanics and its Applications, 2017, vol. 475, issue C, 82-87

Abstract: We investigate the properties of entanglement in one-dimensional fermionic lattices at the Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) superfluid regime. By analyzing occupation probabilities, which are concepts closely related to FFLO and entanglement, we obtain approximate analytical expressions for the spin-flip processes at the FFLO regime. We also apply density matrix renormalization group calculations to obtain the exact ground-state entanglement of the system in superfluid and non-superfluid regimes. Our results reveal a breaking pairs avalanche appearing precisely at the FFLO–normal phase transition. We find that entanglement is non-monotonic in superfluid regimes, feature that could be used as a signature of exotic superfluidity.

Keywords: Entanglement; FFLO superfluidity; Fermionic lattices; Spin-imbalanced systems (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:475:y:2017:i:c:p:82-87

DOI: 10.1016/j.physa.2017.02.013

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