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SWAP gate on two modes of an optical cavity mediated by a laser-dressed V-type atom

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Abstract

A laser-dressed V-type atom trapped in a two-mode optical cavity is investigated, which induces a SWAP gate on the two modes of the cavity. Two laser fields are imposed to interact with the atom dispersively, which leads to an effective interaction between two atomic excited states. The state of the atom prepared initially in the ground state keeps invariant, but the photon exchange between the two cavity modes occurs. Compared with the schemes (Lin et al. in Phys Rev A 77:064301, 2008 and Yan et al. in Quantum Inf Process 17:71, 2018) that use \(\nabla \)-type atoms, the present scheme is more practical, because usually the \(\nabla \)-type atom may be hardly obtained due to the dipole transition selection rule. In addition, the robustness of the SWAP gate against the pulse control error is strengthened by using time-dependent shaped pulses. The effect of the atomic spontaneous radiation and the photon loss is discussed by means of the numerical simulations.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant No. 11805295.

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  1. College of Science, Zhongyuan University of Technology, Zhengzhou, 450007, Henan, China

    Xuehua Zhang, Xingxing Ding & Xianghong Ge

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  1. Xuehua Zhang
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Zhang, X., Ding, X. & Ge, X. SWAP gate on two modes of an optical cavity mediated by a laser-dressed V-type atom. Quantum Inf Process 19, 59 (2020). https://doi.org/10.1007/s11128-019-2556-3

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