Related papers: Development_of_a_novel_high-performance_balanced_homodyne

Development_of_a_novel_high-performance_balanced_homodyne_detector

URL: http://arxiv.org/abs/2503.03298v1
Date: Wed, 05 Mar 2025 09:24:59 GMT
Title: Development_of_a_novel_high-performance_balanced_homodyne_detector
Authors: Hong Lin, Mengmeng Liu, Xiaomin Guo, Yue Luo, Qiqi Wang, Zhijie Song, Yanqiang Guo, Liantuan Xiao,
Abstract summary: This work presents the first application of optimization simulation methodology to balanced homodyne detector (BHD) circuit design.<n>The AC amplifier circuit was implemented through ADS high-frequency simulations using two ABA-52563 RF amplifiers in a cascaded configuration.<n>The implemented system demonstrates a collective generation rate of 20.0504 Gbps across four parallel channels, with all output streams successfully passing NIST SP 800-22 statistical testing requirements.
Score: 4.304487989897226
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: True random numbers are extracted through measurements of vacuum fluctuations in quantum state components. We propose an improved scheme utilizing an optimization-based simulation methodology to enhance the temporal resolution of quantum state detection and processing efficiency of vacuum fluctuation signals in continuous-variable quantum random number generators (CV-QRNGs), while simultaneously maximizing the entropy content of quantum noise sources. This work presents the first application of optimization simulation methodology to balanced homodyne detector (BHD) circuit design, with particular emphasis on improving high-frequency transmission characteristics. The design framework prioritizes system stability and S-parameter sensitivity to optimize both circuit architecture and critical component parameters. The AC amplifier circuit was implemented through ADS high-frequency simulations using two ABA-52563 RF amplifiers in a cascaded configuration, with circuit modeling performed on Rogers 4350 substrate optimized for high-frequency applications. This approach enabled the development of a switched-configuration BHD featuring: 1) 1.9 GHz bandwidth, 2) 41.5 dB signal-to-noise ratio at 1.75 GHz, 3) 30 dB common-mode rejection ratio at 100 MHz, and 4) frequency response flatness within 1.5 dB across 1.3-1.7 GHz. Additionally, the Husimi function is employed for entropy analysis to reconstruct vacuum state phase-space distributions, validating the detector's quantum measurement fidelity. The implemented system demonstrates a collective generation rate of 20.0504 Gbps across four parallel channels, with all output streams successfully passing NIST SP 800-22 statistical testing requirements.

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