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Spectrally resolved Franson interference
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DOI：10.1007/s11433-023-2326-7.png)
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Abstract
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Franson interference can be used to test the nonlocal features of energy-time entanglement and has become a standard in quantum physics. However, most of the previous Franson interference experiments were demonstrated in the time domain, and the spectral properties of Franson interference have not been fully explored. Here, we theoretically and experimentally demonstrate spectrally resolved Franson interference using biphotons with different correlations, including positive correlation, negative correlation, and non-correlation. It is found that the joint spectral intensities of the biphotons can be modulated along both the signal and idler directions, which has potential applications in generating high-dimensional frequency entanglement and time-frequency grid states. This work may provide a new perspective for understanding the spectral-temporal properties of the Franson interferometer.
Keywords:
Franson interference
spectrally resolved measurement
energy-time entanglement
spectral correlation of biphotons
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OPTICS EXPRESS
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OPTICS EXPRESSIF3.3
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