Local invariants for a class of mixed states

Local invariants for a class of mixed states
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DOI:
10.1016/j.physleta.2005.04.005
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发表时间:
2005-06-06
期刊:
影响因子:
2.6
通讯作者:
Goswami, D
Goswami, D
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Albeverio, S;Fei, SM;Goswami, D

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研究了局域幺正变换下量子态的等价性。给出了一类混合态在局域么正变换下的不变量的完备集。它表明,在这个类中的两个状态是局部等价的,当且仅当所有这些不变量有相等的值。(c)2005 Elsevier B.V.保留所有权利。
We investigate the equivalence of quantum states under local unitary transformations. A complete set of invariants under local unitary transformations is presented for a class of mixed states. It is shown that two states in this class are locally equivalent if and only if all these invariants have equal values for them. (c) 2005 Elsevier B.V. All rights reserved.