Quantum information processing in collective-rotating decoherence-free subspace

Quantum information processing in collective-rotating decoherence-free subspace Using the atomic state encoded in the collective-rotating decoherence-free subspace (CRDFS), two methods to construct the hybrid-controlled-phase-flip gate between photon and the single logic qubit are presented assisted by the cavity input–output process. Then, ways to realize the common single-qubit operations in CRDFS are given out. Based on the former gate and single-qubit operations, methods to construct the parity gate and controlled-phase gate in CRDFS are discussed. Next, two ways to realize the Bell-state measurement and the approach to realize quantum information transfer in CRDFS are proposed. Final discussion and numerical simulation reveal that our work is feasible and useful for quantum information processing tasks in CRDFS. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Quantum information processing in collective-rotating decoherence-free subspace

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Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-015-0975-3
Publisher site
See Article on Publisher Site

Abstract

Using the atomic state encoded in the collective-rotating decoherence-free subspace (CRDFS), two methods to construct the hybrid-controlled-phase-flip gate between photon and the single logic qubit are presented assisted by the cavity input–output process. Then, ways to realize the common single-qubit operations in CRDFS are given out. Based on the former gate and single-qubit operations, methods to construct the parity gate and controlled-phase gate in CRDFS are discussed. Next, two ways to realize the Bell-state measurement and the approach to realize quantum information transfer in CRDFS are proposed. Final discussion and numerical simulation reveal that our work is feasible and useful for quantum information processing tasks in CRDFS.

Journal

Quantum Information ProcessingSpringer Journals

Published: Apr 11, 2015

References

  • Universal quantum computation in a decoherence-free subspace for collective relaxation with transmon qubits
    Zhang, ZR; Wu, CW; Li, CY; Dai, HY; Li, CZ
  • Decoherence in ion trap quantum computers
    Garg, A
  • Decoherence bounds on quantum computation with trapped ions
    James, DFV; Knill, EH; Laflamme, R; Petschek, AG

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