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Theoretical comparison of quantum Zeno gates and logic gates based on the cross-Kerr nonlinearity

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Abstract

Quantum logic operations can be implemented using nonlinear phase shifts (the Kerr effect) or the quantum Zeno effect based on strong two-photon absorption. Both approaches utilize three-level atoms, where the upper level is tuned on resonance for the Zeno gates and off-resonance for the nonlinear phase gates. The performance of nonlinear phase gates and Zeno gates are compared under conditions where the parameters of the resonant cavities and three-level atoms are the same in both cases. It is found that the expected performance is comparable for the two approaches despite the fundamental differences between the Zeno and Kerr effects.

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Authors and Affiliations

  1. Department of Physics, University of Maryland, Baltimore County, Baltimore, MD, 21250, USA

    Hao You & J. D. Franson

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  1. Hao You
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  2. J. D. Franson
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Correspondence to J. D. Franson.

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You, H., Franson, J.D. Theoretical comparison of quantum Zeno gates and logic gates based on the cross-Kerr nonlinearity. Quantum Inf Process 11, 1627–1651 (2012). https://doi.org/10.1007/s11128-011-0318-y

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