Autor:	Zheng, Hongjun, Dung, Ho Trung, Hillery, Mark
Rok vydání:	2010
Předmět:	Quantum Physics
Zdroj:	Phys. Rev. A 81, 062311 (2010)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.81.062311
Popis:	There have been numerous studies of entanglement in spin systems. These have usually focussed on examining the entanglement between individual spins or determining whether the state of the system is completely separable. Here we present conditions that allow us to determine whether blocks of spins are entangled. We show that sometimes these conditions can detect entanglement better than conditions involving individual spins. We apply these conditions to study entanglement in spin wave states, both when there are only a few magnons present and also at finite temperature. Comment: accepted for publication in Physical Review A
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1005.4448 Zobrazit plný text záznamu View this record from Arxiv