Cryo-CMOS Readout of Single-Photon Detectors for Color-Center Quantum Computers
G. Carboni (TU Delft - QCD/Sebastiano Lab)
M. Li (TU Delft - Electrical Engineering, Mathematics and Computer Science)
M. C. van der Maas (TU Delft - QID/Ishihara Lab)
L. Enthoven (TU Delft - QCD/Sebastiano Lab, TU Delft - Business Development)
L. Jin (TU Delft - QID/Ishihara Lab)
J. Benserhir (TU Delft - QCD/Sebastiano Lab)
J. Riegelmeyer (TU Delft - QID/Herranz Lab)
C. Errando-Herranz (TU Delft - QID/Herranz Lab, TU Delft - Electrical Engineering, Mathematics and Computer Science)
R. Ishihara (TU Delft - QID/Ishihara Lab, TU Delft - Electrical Engineering, Mathematics and Computer Science)
M. Babaie (TU Delft - Electrical Engineering, Mathematics and Computer Science, TU Delft - QCD/Babaie Lab)
F. Sebastiano (TU Delft - QCD/Sebastiano Lab, TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
This paper presents a scalable cryogenic readout solution for Superconducting Nanowire Single-Photon Detectors (SNSPDs) tailored for the readout of color-center-based qubits. The readout circuit, wire-bonded directly to the SNSPD, utilizes high input impedance to boost the signal amplitude, hence reducing the power consumption, and active quenching to prevent the latching induced by the high impedance. Fabricated in 40-nm CMOS in a 0.14-mm
2 active area, the proposed system demonstrates competitive performance at 0.1 K, featuring low jitter [<60 ps Full Width at Half Maximum (FWHM)], high speed (dead time ≈ 5 ns) and low dark count rate (<1 Hz), while dissipating only 20 μ W. Such an ultra-low power and compact area enables the readout integration within a large-scale colorcenter quantum computer.