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

Myung Kim

Research output: Contribution to journalArticle

244 Citations (Scopus)

Abstract

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.
Original languageEnglish
Article number052308
Pages (from-to)052308
Number of pages1
JournalPhysical Review A
Volume6405
Issue number5
Publication statusPublished - Nov 2001

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

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