Enhancement of Kerr nonlinearity and its application to entangled state discrimination |
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Authors: | Niu Yue-ping Qian Jun Feng Xun-li and Gong Shang-qing |
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Institution: | (1) State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China |
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Abstract: | In this paper, the recent research on the enhanced Kerr nonlinearity and its application in entangled state discrimination
is reported. Two kinds of dynamics, including interacting double dark resonances and spontaneously generated coherence, are
presented to enhance the Kerr nonlinearity. The application of Kerr nonlinearity in quantum state discrimination is also discussed.
An arbitrary Greenberger-Horne-Zeilinger state can be discriminated using two-photon polarization parity detection which resorts
to cross-Kerr nonlinearity between a single-photon qubit and probe field. In addition, a scheme for Greenberger-Horne-Zeilinger
state discrimination of matter qubits is also proposed using the dipole induced transparency in a cavity-dipole system.
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Keywords: | Kerr nonlinearity dark resonance entangled state discrimination |
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