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Abstract: In this paper, we propose a method for building a two-qubit gate with theJaynes-Cummings model JCM. In our scheme, we construct a qubit from a pair ofoptical paths where a photon is running. Generating Knill, Laflamme andMilburn-s nonlinear sign-shift gate by the JCM, we construct the conditionalsign-flip gate, which works with small error probability in principle. We alsodiscuss two experimental setups for realizing our scheme. In the firstexperimental setup, we make use of coherent lights to examine whether or notour scheme works. In the second experimental setup, an optical loop circuitmade out of the polarizing beam splitter and the Pockels cell takes animportant role in the cavity.

Author: Hiroo Azuma

Source: https://arxiv.org/

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