中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1346-1351.doi: 10.1088/1674-1056/18/4/010
张婷, 陈平形, 李承祖
Zhang Ting(张婷)†, Chen Ping-Xing(陈平形), and Li Cheng-Zu(李承祖)
摘要: Motivated by the wise idea of entanglement witness (EW), we present an inequivalent entanglement witness (IEEW) that can analogously classify certain eigenstates entangled in inequivalent ways under stochastic local operations and classical communication (SLOCC) in the Heisenberg spin chain. Since the IEEW is the absolute value of magnetization | M| that is a macroscopically measurable quantity, our conclusions provide a macroscopic method to detect inequivalent entanglement between microscopic spins, on the one hand, and clearly show that inequivalent entanglement can yield different macroscopic effects, on the other hand.
中图分类号: (Quantized spin models, including quantum spin frustration)