Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session GG08: V: Continous Variable QC and Quantum Networks
12:30 PM–2:18 PM,
Monday, March 20, 2023
Room: Virtual Room 8
Sponsoring
Unit:
DQI
Chair: Kero Lau
Abstract: GG08.00008 : FPGA-based signal generation and readout of SNSPD signals for quantum communication
1:54 PM–2:06 PM
Presenter:
Christina Wang
(Caltech)
Author:
Christina Wang
(Caltech)
One key component in producing time-bin encoded photons is a radio-frequency pulse generator. We demonstrate that using the digital-to-analog converters of the FPGA is comparable to commercial arbitrary waveform generators (AWG) by characterizing the coincidence-to-accidental ratio (CAR) and the entanglement visibility of the entangled photon-pair source in the x-basis. We measured a CAR as high as 154, in agreement with the CAR measured with AWG and a high entanglement visibility of 95%.
Finally, we also demonstrate the use of the RFSoC-FPGA in the detection of the photon signals from superconducting nanowire single photon detectors (SNSPDs). We show that the CAR measured using the custom digitizer firmware and pulse-shape reconstruction software is comparable to that measured using commercial time-to-digital converter.
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