An On-Chip Homodyne Detector for Measuring Quantum States

Ferranti, Giacomo; Raffaelli, Francesco; Mahler, Dylan H.; Sibson, Philip; Kennard, Jake; Santamato, Alberto; Sinclair, Gary F.; Bonneau, Damien; Thompson, Mark G.; Matthews, Jonathan C. F.

doi:10.1109/phosst.2018.8456742

Cited by 1 publication

(1 citation statement)

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“…This is due to the reason that the bandwidth of homodyne detector will strictly limit the sampling frequency of the system to avoid large autocorrelation between sampled data, which leads to a limitation on the overall random number generation rate of a system with narrower bandwidth. Comparing with the relevant test results of the homodyne detectors with the same order of bandwidth [32][33][34][35], i.e., several hundreds of megahertz, our proposed scheme shows superior CMRR performance.…”

Section: System Performance Testmentioning

confidence: 86%

Bias-free source-independent quantum random number generator

Zheng¹,

Zhang²,

Huang³

et al. 2020

Opt. Express

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A bias-free source-independent quantum random number generator scheme based on the measurement of vacuum fluctuation is proposed to realize the effective elimination of system bias and common mode noise introduced by the local oscillator. Optimal parameter settings are derived to avoid the system recording two canonically conjugate quadratures simultaneously in each measurement. In particular, it provides a new approach to investigate the performance difference between measuring two quadratures of equal and unequal intensity. It is experimentally demonstrated that the system supports 4.2 Gbps bias-free source-independent random number generation, where its common mode rejection ratio reaches 61.17 dB. Furthermore, the scheme offers an all-optical method facilitating the integration of source-independent quantum random number generators into compact chips.

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Section: System Performance Testmentioning

confidence: 86%