Local transformation of mixed states of two qubits to Bell diagonal states


Autoria(s): Cen LX; Wu NJ; Yang FH; An JH
Data(s)

2002

Resumo

The optimal entanglement manipulation for a single copy of mixed states of two qubits is to transform it to a Bell diagonal state. In this paper we derive an explicit form of the local operation that can realize such a transformation. The result obtained is universal for arbitrary entangled two-qubit states and it discloses that the corresponding local filter is not unique for density matrices with rank n = 2 and can be exclusively determined for that with n = 3 and 4. As illustrations, a four-parameter family of mixed states are explored, the local filter as well as the transformation probability are given explicitly, which verify the validity of the general result.

Identificador

http://ir.semi.ac.cn/handle/172111/11890

http://www.irgrid.ac.cn/handle/1471x/64915

Idioma(s)

英语

Fonte

Cen LX; Wu NJ; Yang FH; An JH .Local transformation of mixed states of two qubits to Bell diagonal states ,PHYSICAL REVIEW A,2002,65 (5):Art.No.052318

Palavras-Chave #光电子学 #2 QUBITS #ENTANGLEMENT MANIPULATION #NOISY ENTANGLEMENT #ARBITRARY STATE #INFORMATION #OPERATIONS
Tipo

期刊论文