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Geometric Entangling Gates in Decoherence-Free Subspaces with Minimal Requirements

Source: Phys. Rev. Lett. 103, 200501 (2009); doi:10.1103/PhysRevLett.103.200501

Published 10 November 2009

PACS
  • 03.67.Lx
    Quantum computation architectures and implementations
  • 03.65.Vf
    Phases: geometric; dynamic or topological (quantum theory)
  • 03.65.Yz
    Decoherence; open systems; quantum statistical methods
  • 42.50.Pq
    Cavity quantum electrodynamics; micromasers
  • YEAR: 2009
PUBLICATION DATA
Publisher:
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Xun-Li Feng, Chunfeng Wu, Hui Sun, and C. H. Oh
Department of Physics and Centre for Quantum Technologies, National University of Singapore, 2 Science Drive 3, Singapore 117542
We introduce a new strongly driven dispersive atom-cavity interaction and develop a new scheme for implementing the nontrivial entangling gates for two logical qubits in decoherence-free subspaces (DFSs). Our scheme combines the robust advantages of DFS and the geometric phase. Moreover, only two neighboring physical qubits, which encode a logical qubit, are required to undergo the collective dephasing in our scheme. ©2009 The American Physical Society
History: Received 30 March 2009; published 10 November 2009
Permalink: http://link.aps.org/abstract/PRL/v103/e200501
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