dorsal/arxiv
View SchemaLocal transformation of mixed states of two qubits to Bell diagonal states
| Authors | Li-Xiang Cen, Nan-Jian Wu, Fu-Hua Yang, Jun-Hong An |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0203092 |
| URL | https://arxiv.org/abs/quant-ph/0203092 |
| DOI | 10.1103/PhysRevA.65.052318 |
| Journal | Phys. Rev. A 65, 052318 (2002) |
Abstract
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-parameters 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.
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"abstract": "The optimal entanglement manipulation for a single copy of mixed states of\ntwo qubits is to transform it to a Bell diagonal state. In this paper we derive\nan explicit form of the local operation that can realize such a transformation.\nThe result obtained is universal for arbitrary entangled two-qubit states and\nit discloses that the corresponding local filter is not unique for density\nmatrices with rank $n=2$ and can be exclusively determined for that with $n=3$\nand 4. As illustrations, a four-parameters family of mixed states are explored,\nthe local filter as well as the transformation probability are given\nexplicitly, which verify the validity of the general result.",
"arxiv_id": "quant-ph/0203092",
"authors": [
"Li-Xiang Cen",
"Nan-Jian Wu",
"Fu-Hua Yang",
"Jun-Hong An"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.65.052318",
"journal_ref": "Phys. Rev. A 65, 052318 (2002)",
"title": "Local transformation of mixed states of two qubits to Bell diagonal states",
"url": "https://arxiv.org/abs/quant-ph/0203092"
},
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