Economical Gaussian cloning of coherent states with known phase

Journal Article · Sun Jul 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.014303· OSTI ID:21011336

Yuli, Dong; Xubo, Zou; Guangcan, Guo ^[1]; Shangbin, Li ^[2]

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1. Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026 (China)
2. Shanghai Research Center of Amertron-global, Zhangjiang High-Tech Park, 299 Lane, Bishen Road No.3, Suite 203, Shanghai (China)

We investigate the economical Gaussian cloning of coherent states with the known phase, which produces M copies from N input replica and can be implemented with degenerate parametric amplifiers and beam splitters.The achievable fidelity of single copy is given by 2M{radical}(N)/[{radical}(N)(M-1)+{radical}((1+N)(M{sup 2}+N))], which is bigger than the optimal fidelity of the universal Gaussian cloning. The cloning machine presented here works without ancillary optical modes and can be regarded as the continuous variable generalization of the economical cloning machine for qudits.

• OSTI ID: 21011336
• Journal Information: Physical Review. A, Vol. 76, Issue 1; Other Information: DOI: 10.1103/PhysRevA.76.014303; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EIGENSTATES
GAUSSIAN PROCESSES
OPTICAL MODES
PARAMETRIC AMPLIFIERS
QUANTUM COMPUTERS
QUANTUM MECHANICS