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Class of Unlockable Bound Entangled States and Their Applications |
| DIAO Da-Sheng, ZHANG Cheng-Jie, ZHANG Yong-Sheng, GUO Guang-Can |
| Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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DIAO Da-Sheng, ZHANG Cheng-Jie, ZHANG Yong-Sheng et al 2008 Chin. Phys. Lett. 25 2366-2369 |
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Abstract A class of unlockable bound entangled states and their applications are presented. They can be considered as quasi generalized Smolin states [Phys. Rev. A 63(2001)032306], which are the states of N+N qubits. No pure entanglement can be distilled from this class of states by local quantum operations and classical communications. However, if certain parties group together, they become distillable. Although they are bound entangled states, they could be used to achieve some non-trivial tasks, such as quantum secret sharing shown in the study.
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| Keywords:
03.67.Mn
03.67.Hk
03.65.Ud
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Received: 16 April 2008
Published: 26 June 2008
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| PACS: |
03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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03.67.Hk
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(Quantum communication)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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