Quantum phase transitions in fully connected spin models: an entanglement perspective

Autor:	Filippone, M., Dusuel, S., Vidal, J.
Rok vydání:	2011
Předmět:	Condensed Matter - Statistical Mechanics Quantum Physics
Zdroj:	Phys. Rev. A 83, 022327 (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.83.022327
Popis:	We consider a set of fully connected spins models that display first- or second-order transitions and for which we compute the ground-state entanglement in the thermodynamical limit. We analyze several entanglement measures (concurrence, R\'enyi entropy, and negativity), and show that, in general, discontinuous transitions lead to a jump of these quantities at the transition point. Interestingly, we also find examples where this is not the case. Comment: 9 pages, 7 figures, published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1101.3654 Zobrazit plný text záznamu View this record from Arxiv