Quantum Fourier transform of polarization photons mediated by weak cross-Kerr nonlinearity
作者： Li Dong , Xiao-Ming Xiu , Hong-Zhi Shen , Ya-Jun Gao , X. X. Yi
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摘要: We present a scheme of two-photon quantum Fourier transform at first, where the controlled π/2 phase gate and Hadamard gates are applied. The indirect interaction between two photons can be realized through coupling bus provided by coherent state in Kerr media. Employing photon-number measurements corresponding classical feed-forward techniques, task low-error fulfilled. With revision modulation on optical elements, π/2n (n=2,3,…) constructed, multiphoton achieved integrating these gates.
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