Quantum computation with the Jaynes-Cummings model

Details Quantum computation with the Jaynes-Cummings model Quantum computation with the Jaynes-Cummings model

2008-08-22

arxiv.org/abs/0808.3027v7

Prog. Theor. Phys. 126 (2011), 369-385

Physics

Quantum Physics

4 pages, 2 eps figures, latex2e; v2: Figure 1 and its caption are modified; v3: one new section is added; v4: experimental set

Scientific paper

10.1143/PTP.126.369

In this paper, we propose a method for building a two-qubit gate with the Jaynes-Cummings model (JCM). In our scheme, we construct a qubit from a pair of optical paths where a photon is running. Generating Knill, Laflamme and Milburn's nonlinear sign-shift gate by the JCM, we construct the conditional sign-flip gate, which works with small error probability in principle. We also discuss two experimental setups for realizing our scheme. In the first experimental setup, we make use of coherent lights to examine whether or not our scheme works. In the second experimental setup, an optical loop circuit made out of the polarizing beam splitter and the Pockels cell takes an important role in the cavity.

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