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Phys. Rev. Lett. 92, 047903 (2004) [4 pages]

Remote Preparation of a Single-Mode Photonic Qubit by Measuring Field Quadrature Noise

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S. A. Babichev, B. Brezger, and A. I. Lvovsky*
Fachbereich Physik, Universität Konstanz, D-78457 Konstanz, Germany

Received 25 August 2003; published 29 January 2004

An electromagnetic field quadrature measurement, performed on one of the modes of the nonlocal single-photon state α|1,0⟩-β|0,1⟩, collapses it into a superposition of the single-photon and vacuum states in the other mode. We use this effect to implement remote preparation of arbitrary single-mode photonic qubits conditioned on observation of a preselected quadrature value. The preparation efficiency of the resulting qubit can be higher than that of the initial single photon.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.047903
DOI:
10.1103/PhysRevLett.92.047903
PACS:
03.67.Hk, 03.67.Mn, 42.50.Dv

*Electronic address: http://www.uni-konstanz.de/quantum-optics/quantech/