Cryogenic amplification of image-charge detection for readout of quantum states of electrons on liquid helium
Cryogenic amplification of image-charge detection for readout of quantum states of electrons on liquid helium
复制标题
用于读出液氦上电子量子态的图像电荷检测的低温放大
DOI:
10.1007/s10909-020-02552-w
复制
发表时间:
2021
影响因子:
2
通讯作者:
Konstantinov Denis
中科院分区:
文献类型:
--
作者:
Elarabi Asem;Kawakami Erika;Konstantinov Denis
Accurate detection of quantum states is a vital step in the development of quantum computing. Image-charge detection of quantum states of electrons on liquid helium can potentially be used for the readout of a single-electron qubit; however, low sensitivity due to added noise hinders its usage in high-fidelity and high-bandwidth (BW) applications. One method to improve the readout accuracy and bandwidth is to use cryogenic amplifications near the signal source to minimize the effects of stray capacitance. We experimentally demonstrate a two-stage amplification scheme with a low power dissipation ofat the first stage located at the still plate of the dilution refrigerator and a high gain ofat the second stage located at the 4 K plate. The good impedance matching between different stages and output devices ensures high BW and constant gain in a wide frequency range. The detected image-charge signals are compared for one-stage and two-stage amplification schemes.
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DOI:
10.1016/j.nima.2019.06.022
发表时间:
2016
期刊:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
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arXiv: Mesoscale and Nanoscale Physics
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影响因子:
2.9
作者:
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DOI:
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期刊:
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影响因子:
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