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Phys. Rev. A 65, 062303 (2002) [7 pages]

Gain tuning and fidelity in continuous-variable quantum teleportation

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Toshiki Ide*
Department of Physics, Faculty of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

Holger F. Hofmann
CREST, Japan Science and Technology Corporation (JST), Research Institute for Electronic Science, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812, Japan

Akira Furusawa
Department of Applied Physics, Faculty of Engeneering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

Takayoshi Kobayashi
CREST, Japan Science and Technology Corporation (JST), Department of Physics, Faculty of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

Received 24 November 2001; revised 21 February 2002; published 29 May 2002

The fidelity of continuous-variable teleportation can be optimized by changing the gain in the modulation of the output field. We discuss the gain dependence of fidelity for coherent, vacuum, and one-photon inputs and propose optimal gain tuning strategies for corresponding input selections.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.65.062303
DOI:
10.1103/PhysRevA.65.062303
PACS:
03.67.Hk, 42.50.-p

*Electronic address: ide@femto.phys.s.u-tokyo.ac.jp

 
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