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arXiv · 2309.14559

Design of deeply cooled ultra-low dissipation amplifier and measuring cell for quantum measurements with a microwave single-photon counter

O. G. Turutanov·A. M. Korolev·V. I. Shnyrkov·A. P. Shapovalov·M. Baránek·S. Kern·V. Yu. Lyakhno·P. Neilinger·M. Grajcar
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Abstract

The requirements and details of designing a measuring cell and low-back-action deeply-cooled amplifier for quantum measurements at 10 mK are discussed. This equipment is a part of a microwave single-photon counter based on a superconducting flux qubit. The high electron mobility transistors (HEMTs) in the amplifier operate in unsaturated microcurrent regime and dissipate only 1 microwatt of dc power per transistor. Simulated amplifier gain is 15 dB at 450 MHz with a high-impedance (~5 kOhm signal source and standard 50-Ohm output.

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O. G. Turutanov, A. M. Korolev, V. I. Shnyrkov, A. P. Shapovalov, M. Baránek, S. Kern, V. Yu. Lyakhno, P. Neilinger, M. Grajcar. 2023-09-25. Design of deeply cooled ultra-low dissipation amplifier and measuring cell for quantum measurements with a microwave single-photon counter. https://arxiv.org/abs/2309.14559

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