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