期刊论文

Wang, Xin-Wen

英文

PHYSICAL REVIEW A

2469-9926

2012

85

5

052326

10.1103/PhysRevA.85.052326

National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11004050, 11075050]; Program for Changjiang Scholars and Innovative Research Team in UniversityProgram for Changjiang Scholars & Innovative Research Team in University (PCSIRT) [IRT0964]; Chinese Ministry of EducationMinistry of Education, China [211119]; Hunan Provincial Education DepartmentHunan Provincial Education Department [09A013, 10B013]; construct program of the key discipline in Hunan province

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The cross-Kerr nonlinearity (XKNL) effect can induce efficient photon interactions in principle with which photonic multiqubit gates can be performed using far fewer physical resources than linear optical schemes. Unfortunately, it is extremely challenging to generate giant cross-Kerr nonlinearities. In recent years much effort has been made to perform multiqubit gates via weak XKNLs. However, the required nonlinearity strengths are still difficult to achieve in an experiment. We here propose an XKNL-based scheme for realizing a two-photon polarization-parity gate, a universal two-qubit gate, ...