Entanglement in a second order quantum phase transition
| dc.creator | Vidal, J. | |
| dc.creator | Palacios, G. | |
| dc.creator | Mosseri, R. | |
| dc.date | 2003-05-23 | |
| dc.date | 2003-12-02 | |
| dc.date.accessioned | 2026-07-07T06:33:55Z | |
| dc.date.available | 2026-07-07T06:33:55Z | |
| dc.description | We consider a system of mutually interacting spin 1/2 embedded in a transverse magnetic field which undergo a second order quantum phase transition. We analyze the entanglement properties and the spin squeezing of the ground state and show that, contrarily to the one-dimensional case, a cusp-like singularity appears at the critical point $λ_c$, in the thermodynamic limit. We also show that there exists a value $λ_0 \geq λ_c$ above which the ground state is not spin squeezed despite a nonvanishing concurrence. | |
| dc.description | 4 pages, 4 EPS figures, minor corrections added and title changed | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0305573 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0305573 | |
| dc.identifier | Phys. Rev. A 69, 022107 (2004) | |
| dc.identifier | doi:10.1103/PhysRevA.69.022107 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/99357 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Quantum Physics | |
| dc.title | Entanglement in a second order quantum phase transition | |
| dc.type | text |