Multi-photon interference phenomena were usually observed in the time domain,and their interferograms were obtained by recording the coincidence counts as a function of the temporal delay.However,the spectral information of the involved photons was integrated and lost during the time-domain measurement.Spectrally resolved measurement is a technology where detectors can distinguish the frequency of each photon,which allows for the observation of multi-photon interference phenomena in the frequency domain.This technology can detect interference effects that are not observable in the time domain.Its short acquisition times and large dynamic range make it highly valuable for research and applications.In this paper,we first review the research progress on spectrally resolved two-photon interference,including HOM interference,N00N state interference,and Franson interference,as well as advances in spectrally resolved three-photon and four-photon interference.We then introduce the applications of these spectrally resolved interferences in generating high-dimensional frequency entanglement and time-frequency grid states,as well as their use in quantum precision measurements.Finally,we provide a summary and outlook on this field.
关键词
频谱可分辨测量/多光子干涉/HOM干涉/N00N态干涉/Franson干涉/双光子干涉
Key words
spectrally resolved measurement/multi-photon interference/HOM interference/N00N state interference/Franson interference/two-photon interference
维普
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