High-dimensional time-frequency entanglement in a singly-filtered biphoton frequency comb

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Acknowledgement

The authors acknowledge discussions with Zhenda Xie, Changchen Chen, Abhinav Kumar Vinod, Wei Liu, Jiahui Huang, Patrick Hayden, Pengfei Fan, Mi Lei, Charles Ci Wen Lim, and Alexander Euk Jin Ling; discussions on the superconducting nanowire single-photon detectors with Vikas Anant; Justin Caram for the help on the heralded auto-correlation measurements with a Hydraharp. This study is supported by the Army Research Office Multidisciplinary University Research Initiative (W911NF-21-2-0214), National Science Foundation under award numbers 1741707 (EFRI ACQUIRE), 1919355, 1936375 (QII-TAQS), and 2137984 (QuIC-TAQS). Part of this research was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA.

Contributions

These authors contributed equally: Xiang Cheng, Kai-Chi Chang.

X.C. conceived the project and designed the experiments. K.C.C. and X.C. conducted the measurements and performed data analysis. J.H.S., K.C.C., X.C., and M.C.S. contributed to the theory and numerical modeling. A.M., M.S., M.D.S., and B.K. contributed the low-jitter SNSPD detectors. F.N.C.W, J.H.S., A.F., and C.W.W. supported and discussed the studies. X.C., K.-C.C., J.H.S., and C.W.W. prepared the manuscript. All authors contributed to the discussion and revision of the manuscript.

Data Availability

The datasets generated during and/or analyzed during the current study are available from the corresponding authors on reasonable request.

Conflict of Interest

The authors declare no competing interests.