Passive microwave circulation on a superconducting chip
- URL: http://arxiv.org/abs/2308.14643v1
- Date: Mon, 28 Aug 2023 15:16:29 GMT
- Title: Passive microwave circulation on a superconducting chip
- Authors: Arkady Fedorov, N. Pradeep Kumar, Dat Thanh Le, Rohit Navarathna,
Prasanna Pakkiam, Thomas M. Stace
- Abstract summary: We report the realisation of a passive on-chip circulator which is made from a loop consisting of three tunnel-coupled superconducting islands, with DC-only control fields.
When tuned for circulation, the device exhibits strongly non-reciprocal 3-port scattering, with average on-resonance insertion loss of 2 dB, isolation of 14 dB, power reflectance of -11 dB, and a bandwidth of 200 MHz.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: Building large-scale superconducting quantum circuits will require
miniaturisation and integration of supporting devices including microwave
circulators, which are currently bulky, stand-alone components. Here we report
the realisation of a passive on-chip circulator which is made from a loop
consisting of three tunnel-coupled superconducting islands, with DC-only
control fields. We observe the effect of quasiparticle tunnelling, and we
dynamically classify the system into different quasiparticle sectors. When
tuned for circulation, the device exhibits strongly non-reciprocal 3-port
scattering, with average on-resonance insertion loss of 2 dB, isolation of 14
dB, power reflectance of -11 dB, and a bandwidth of 200 MHz.
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