Related papers: Gain-switched vcsel as a quantum entropy source: the problem of quantum and classical noise

Gain-switched vcsel as a quantum entropy source: the problem of quantum and classical noise

URL: http://arxiv.org/abs/2301.11973v1
Date: Fri, 27 Jan 2023 20:09:00 GMT
Title: Gain-switched vcsel as a quantum entropy source: the problem of quantum and classical noise
Authors: Roman Shakhovoy, Elizaveta Maksimova
Abstract summary: We consider the problem of quantum noise extraction from polarization swapping in a gain-switched VCSEL. We show how to evaluate the contribution of classical noise and how to calculate the quantum reduction factor required for post-processing.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We consider the problem of quantum noise extraction from polarization swapping in a gain-switched VCSEL. The principle of operation of a quantum random number generator is based on the generation of laser pulses with one of two orthogonal polarization states, followed by digitization of polarization-resolved pulses with a comparator. At intensity values of laser pulses close to the threshold value of the comparator, the contribution of the classical noise of the photodetector will have a crucial role in making a decision on the choice of a logical zero or one. We show how to evaluate the contribution of classical noise and how to calculate the quantum reduction factor required for post-processing.

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