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Phys. Rev. A 72, 052309 (2005) [5 pages]

Controlled unitary operation between two distant atoms

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Jaeyoon Cho
Division of Optical Metrology, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea

Hai-Woong Lee
Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea

Received 26 January 2005; published 9 November 2005

We propose a scheme for implementing a controlled unitary gate between two distant atoms directly communicating through a quantum transmission line. To achieve our goal, only a series of several coherent pulses are applied to the atoms. Our scheme thus requires no ancilla atomic qubit. The simplicity of our scheme may significantly improve the scalability of quantum computers based on trapped neutral atoms or ions.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.052309
DOI:
10.1103/PhysRevA.72.052309
PACS:
03.67.Lx, 03.67.Hk, 42.50.Pq