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  • Experimental demonstration of a nondestructive controlled-NOT quantum gate for two independent photon qubits

    • 摘要:

      Universal logic gates for two quantum bits (qubits) form an essential ingredient of quantum information processing. However, photons, one of the best candidates for qubits, suffer from a lack of strong nonlinear coupling, which is required for quantum logic operations. Here we show how this drawback can be overcome by reporting a proof-of-principle experimental demonstration of a nondestructive controlled-NOT (CNOT) gate for two independent photons using only linear optical elements in conjunction with single-photon sources and conditional dynamics. Moreover, we exploit the CNOT gate to discriminate all four Bell states in a teleportation experiment. © 2005 The American Physical Society.

    • 作者:

      Zhao Zhi;Zhang An-Ning;Chen Yu-Ao;Zhang Han;Du Jiang-Feng;Yang Tao;Pan Jian-Wei

    • 刊名:

      Physical Review Letters

    • 在线出版时间:

      2005