Artículos de revistas
Entanglement and exotic superfluidity in spin-imbalanced lattices
Fecha
2017-06-01Registro en:
Physica A-statistical Mechanics And Its Applications. Amsterdam: Elsevier Science Bv, v. 475, p. 82-87, 2017.
0378-4371
10.1016/j.physa.2017.02.013
WOS:000396960200008
WOS000396960200008.pdf
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.