Criterion For Local Distinguishability of Arbitrary Orthogonal States
نویسندگان
چکیده
In this Letter we present a necessary condition for distinguishability of multi-partite orthogonal quantum states by local operations and classical communication. With this condition one can discuss the distinguishability of orthogonal states further. We also present a necessary condition for distinguishability of bipartite orthogonal quantum states by local operations and classical, which is simple and general. With this condition one can get many cases of indistinguishability. The conclusions may be also useful in understanding the essence of nonlocality and discussing the distillation of entanglement. PACS number(s): 89.70.+c, 03.65.ud
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