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Demonstration of deterministic and high fidelity squeezing of quantum information

Jun-ichi Yoshikawa, Toshiki Hayashi, Takayuki Akiyama, Nobuyuki Takei, Alexander Huck, Ulrik L. Andersen, and Akira Furusawa
Phys. Rev. A 76, 060301(R) – Published 11 December 2007

Abstract

By employing a recent proposal [R. Filip, P. Marek, and U.L. Andersen, Phys. Rev. A 71, 042308 (2005)] we experimentally demonstrate a universal, deterministic, and high-fidelity squeezing transformation of an optical field. It relies only on linear optics, homodyne detection, feedforward, and an ancillary squeezed vacuum state, thus direct interaction between a strong pump and the quantum state is circumvented. We demonstrate three different squeezing levels for a coherent state input. This scheme is highly suitable for the fault-tolerant squeezing transformation in a continuous variable quantum computer.

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  • Received 5 February 2007

DOI:https://doi.org/10.1103/PhysRevA.76.060301

©2007 American Physical Society

Authors & Affiliations

Jun-ichi Yoshikawa1,2, Toshiki Hayashi1, Takayuki Akiyama1, Nobuyuki Takei1,2, Alexander Huck1,3,4, Ulrik L. Andersen3,4, and Akira Furusawa1,2

  • 1Department of Applied Physics, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • 2CREST, Japan Science and Technology Agency, 1-9-9 Yaesu, Chuo-ku, Tokyo 103-0028, Japan
  • 3Institut für Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universität Erlangen-Nürnberg, Günther-Scharowsky Straße 1, 91058 Erlangen, Germany
  • 4Department of Physics, Technical University of Denmark, Building 309, 2800 Kgs. Lyngby, Denmark

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Issue

Vol. 76, Iss. 6 — December 2007

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