Chinese Journal of Quantum Electronics, Volume. 33, Issue 5, 553(2016)

Quantum computation in decoherence-free subspaces for overcoming bit-flip error in cavity QED

Yueyue CHEN1,2、*, Chengpu LIU1, and Xunli FENG3
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
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    Universal quantum computation overcoming influnce of bit-flip error is realized by suppressing collective decoherence with decoherence-free subspace method. The scheme is based on cavity QED system. A logical bit is encoded by two adjacent atoms trapped in a cavity, and a four-dimensional decoherence-free subspace is constructed to suppress the collective bit reversal error. By adjusting the coupling between the external optical field and cavity, two noncommutative single-qubit operations and a controlled phase gate are implemented in decoherence-free subspace. Universal quantum computation overcoming the collective bit reversal error is realized.

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    CHEN Yueyue, LIU Chengpu, FENG Xunli. Quantum computation in decoherence-free subspaces for overcoming bit-flip error in cavity QED[J]. Chinese Journal of Quantum Electronics, 2016, 33(5): 553

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    Paper Information

    Received: Jan. 4, 2015

    Accepted: --

    Published Online: Oct. 21, 2016

    The Author Email: Yueyue CHEN (chenyueyue@siom.ac.cn)

    DOI:10.3969/j.issn.1007-5461. 2016.05.007

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