Complete spectral characterization of biphotons by simultaneously determining its frequency sum and difference in a single quantum interferometer
arXiv:2305.13734 · doi:10.1103/PhysRevA.108.023713
Abstract
We theoretically propose a novel quantum interferometer in which the NOON state interferometer (NOONI) is combined with the Hong-Ou-Mandel interferometer (HOMI). This interferometer combined the advantages of both the NOONI that depends on biphoton frequency sum, and the HOMI that depends on biphoton frequency difference into a single interferometer. It can thus simultaneously obtain the spectral correlation information of biphotons in both frequency sum and difference by taking the Fourier transform from a single time-domain quantum interferogram, which provides a method for complete spectral characterization of an arbitrary two-photon state with exchange symmetry. A direct application of such an interferometer can be found in quantum Fourier-transform spectroscopy where direct spectral measurement is difficult. Furthermore, as it can realize the measurement of time intervals on three scales at the same time, we expect that it can provide a new method in quantum metrology. Finally, we discuss another potential application of such an interferometer in the generation and characterization of high-dimensional and phase-controlled frequency entanglement.
11 pages, 3 figures
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