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Superconducting Qubits Quantum Simulation

Nonlinear response of telecom-wavelength superconducting single-photon detectors

arXiv
Authors: Patrick Mark, Sebastian Gstir, Julian Münzberg, Gregor Weihs, Robert Keil

Year

2024

Paper ID

64834

Status

Preprint

Abstract Read

~2 min

Abstract Words

96

Citations

N/A

Abstract

We measure the nonlinearity of a telecom-wavelength superconducting nanowire single-photon detector via incoherent beam combination. At typical photon count rates and detector bias current, the observed relative deviation from a perfectly linear response is in the order of 0.1% when the flux is doubled. This arises from a balance between the counteracting nonlinearities of deadtime-induced detector saturation and of multi-photon detections. The observed behaviour is modelled empirically, which suffices for a correction of measured data. In addition, statistical simulations, taking into account the measured recovery of the detection efficiency, provide insight into possible mechanisms of multi-photon detection.

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  • This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
  • It adds a 2024 reference point for readers tracking recent quantum research.
  • We measure the nonlinearity of a telecom-wavelength superconducting nanowire single-photon detector via incoherent beam combination.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2407.20682 [2] arXiv https://arxiv.org/abs/2407.20682 [3] Publisher https://arxiv.org/abs/2407.20682

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