Entanglement and exotic superfluidity in spin-imbalanced lattices
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Elsevier B.V.
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Resumo
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. (C) 2017 Elsevier B.V. All rights reserved.
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Entanglement, FFLO superfluidity, Fermionic lattices, Spin-imbalanced systems
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Inglês
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Physica A-statistical Mechanics And Its Applications. Amsterdam: Elsevier Science Bv, v. 475, p. 82-87, 2017.
