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Flux-tunable heat sink for quantum electric circuits.

ABSTRACT: Superconducting microwave circuits show great potential for practical quantum technological applications such as quantum information processing. However, fast and on-demand initialization of the quantum degrees of freedom in these devices remains a challenge. Here, we experimentally implement a tunable heat sink that is potentially suitable for the initialization of superconducting qubits. Our device consists of two coupled resonators. The first resonator has a high quality factor and a fixed frequency whereas the second resonator is designed to have a low quality factor and a tunable resonance frequency. We engineer the low quality factor using an on-chip resistor and the frequency tunability using a superconducting quantum interference device. When the two resonators are in resonance, the photons in the high-quality resonator can be efficiently dissipated. We show that the corresponding loaded quality factor can be tuned from above 10⁵ down to a few thousand at 10 GHz in good quantitative agreement with our theoretical model.

SUBMITTER: Partanen M

PROVIDER: S-EPMC5910410 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Flux-tunable heat sink for quantum electric circuits.

Partanen M M Tan K Y KY Masuda S S Govenius J J Lake R E RE Jenei M M Grönberg L L Hassel J J Simbierowicz S S Vesterinen V V Tuorila J J Ala-Nissila T T Möttönen M M

Scientific reports 20180420 1

Superconducting microwave circuits show great potential for practical quantum technological applications such as quantum information processing. However, fast and on-demand initialization of the quantum degrees of freedom in these devices remains a challenge. Here, we experimentally implement a tunable heat sink that is potentially suitable for the initialization of superconducting qubits. Our device consists of two coupled resonators. The first resonator has a high quality factor and a fixed fr ...[more]

PMID: 29679059

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Dataset Information

Flux-tunable heat sink for quantum electric circuits.

Publications

Flux-tunable heat sink for quantum electric circuits.

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