### Abstract

Original language | English |
---|---|

Article number | 052308 |

Pages (from-to) | 052308 |

Number of pages | 1 |

Journal | Physical Review A |

Volume | 6405 |

Issue number | 5 |

Publication status | Published - Nov 2001 |

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### Cite this

*Physical Review A*,

*6405*(5), 052308. [052308].

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*Physical Review A*, vol. 6405, no. 5, 052308, pp. 052308.

**Quantum-information processing for a coherent superposition state via a mixed entangled coherent channel.** / Kim, Myung.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Quantum-information processing for a coherent superposition state via a mixed entangled coherent channel

AU - Kim, Myung

PY - 2001/11

Y1 - 2001/11

N2 - An entangled two-mode coherent state is studied within the framework of 2 x 2-dimensional Hilbert space. An entanglement concentration scheme based on joint Bell-state measurements is worked out. When the entangled coherent state is embedded in vacuum environment, its entanglement is degraded but not totally lost. It is found that the larger the initial coherent amplitude, the faster entanglement decreases. We investigate a scheme to teleport a coherent superposition state while considering a mixed quantum channel. We find that the decohered entangled coherent state may be useless for quantum teleportation as it gives the optimal fidelity of teleportation less than the classical limit 2/3.

AB - An entangled two-mode coherent state is studied within the framework of 2 x 2-dimensional Hilbert space. An entanglement concentration scheme based on joint Bell-state measurements is worked out. When the entangled coherent state is embedded in vacuum environment, its entanglement is degraded but not totally lost. It is found that the larger the initial coherent amplitude, the faster entanglement decreases. We investigate a scheme to teleport a coherent superposition state while considering a mixed quantum channel. We find that the decohered entangled coherent state may be useless for quantum teleportation as it gives the optimal fidelity of teleportation less than the classical limit 2/3.

UR - http://www.scopus.com/inward/record.url?scp=4244098575&partnerID=8YFLogxK

M3 - Article

VL - 6405

SP - 052308

JO - Physical Review A (Atomic, Molecular, and Optical Physics)

JF - Physical Review A (Atomic, Molecular, and Optical Physics)

SN - 1050-2947

IS - 5

M1 - 052308

ER -