Tunable compact on-chip superconducting switch

• URL: http://arxiv.org/abs/2402.19394v1
• Date: Thu, 29 Feb 2024 17:53:19 GMT
• Title: Tunable compact on-chip superconducting switch
• Authors: Julia Zotova, Alexander Semenov, Rui Wang, Yu Zhou, Oleg Astafiev and Jaw-Shen Tsai
• Abstract summary: Isolation between channel exceeds 20dB over a bandwidth of several hundred megahertz, exceeding 40 dB at some frequencies. Switch requires only a global flux bias without either permanent magnets or micro-electromechanical structures.
• Score: 45.79162574362196
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We develop a compact four-port superconducting switch with a tunable operating frequency in the range of 4.8 GHz -- 7.3 GHz. Isolation between channel exceeds 20~dB over a bandwidth of several hundred megahertz, exceeding 40 dB at some frequencies. The footprint of the device is $80\times420~\mu$m. The tunability requires only a global flux bias without either permanent magnets or micro-electromechanical structures. As the switch is superconducting, the heat dissipation during operation is negligible. The device can operate at up to -80~dBm, which is equal to $2.5\times 10^6$ photons at 6 GHz per microsecond. The device show a possibility to be operated as a beamsplitter with tunable splitting ratio.

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