Phase Sensitivity of a Multi-mode Nonlinear Interferometer with Single Photons |
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| Authors: | Chao-Ping Wei Ya-Fei Yu Zhi-Ming Zhang |
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| Affiliation: | 1.Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices (SIPSE),South China Normal University,Guangzhou,China;2.Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials,South China Normal University,Guangzhou,China |
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| Abstract: | We propose a multi-mode nonlinear interferometer and study its phase sensitivity for two, three and four modes with single photons as inputs. We find that the phase sensitivity of the nonlinear interferometers can be improved by increasing the nonlinear index k. And when the total number of the input photons is fixed, increasing the number of modes is detrimental to the phase sensitivity. |
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