| dc.creator | Di Tullio, Marco | |
| dc.creator | Rossignoli, Raúl Dante | |
| dc.creator | Cerezo, M. | |
| dc.creator | Gigena, N. | |
| dc.date | 2019-12-03 | |
| dc.date.accessioned | 2022-10-16T23:01:14Z | |
| dc.date.available | 2022-10-16T23:01:14Z | |
| dc.identifier | https://digital.cic.gba.gob.ar/handle/11746/10969 | |
| dc.identifier | Recurso completo | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4413381 | |
| dc.description | We examine the fermionic entanglement in the ground state of the fermionic Lipkin model and its relation with bipartite entanglement. It is first shown that the one-body entanglement entropy, which quantifies the minimum distance to a fermionic Gaussian state, behaves similarly to the mean-field order parameter and is essentially proportional to the total bipartite entanglement between the upper and lower modes, a quantity meaningful only in the fermionic realization of the model. We also analyze the entanglement of the reduced state of four single-particle modes (two up-down pairs), showing that its fermionic concurrence is strongly peaked at the phase transition and behaves differently from the corresponding up-down entanglement. We finally show that the first measures and the up-down reduced entanglement can be correctly described through a basic mean-field approach supplemented with symmetry restoration, whereas the concurrence requires at least the inclusion of random-phase-approximation–type correlations for a proper prediction. Fermionic separability is also discussed. | |
| dc.format | application/pdf | |
| dc.language | Inglés | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.subject | Ciencias Físicas | |
| dc.subject | Quantum entanglement | |
| dc.subject | Fermion systems | |
| dc.title | Fermionic entanglement in the Lipkin model | |
