Work

Bound entanglement in the XY model

Year: 2007

Type: article

Abstract: We study the multi-spin entanglement for the 1D anisotropic XY model concentrating on the simplest case of three-spin entanglement. As compared to the pairwise entanglement, three-party quantum correlations have a longer range and they are more robust on increasing the temperature. We find regions of the phase diagram of the system where bound entanglement (BE) occurs, both at zero and finite temperature. BE in the ground state can be obtained by tuning the magnetic field. Thermal BE emerges naturally due to the effect of temperature on the free ground state entanglement.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/9/9/322

Authors: D Patanè, Rosario Fazio, L Amico

Institutions: University of Catania, Scuola Internazionale Superiore di Studi Avanzati, Scuola Normale Superiore, National Enterprise for NanoScience and NanoTechnology

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

Funders: Scuola Normale Superiore, Ministero dell’Istruzione, dell’Università e della Ricerca