# Simultaneously determining the frequency sum and time difference of two photons through sum frequency generation

@inproceedings{Liu2019SimultaneouslyDT, title={Simultaneously determining the frequency sum and time difference of two photons through sum frequency generation}, author={Liu and Amr}, year={2019} }

We propose, analyze and evaluate a technique for the joint measurement of time-frequency entanglement between two photons. In particular, we show that the frequency sum and time difference of two photons could be simultaneously measured through the sum-frequency generation process, without measuring the time or frequency of each individual photon. We demonstrate the usefulness of this technique by using it to design a time-frequency entanglement based continuous variable superdense coding and a…

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