Abstract
Josephson parametric amplifiers (JPAs) approaching quantum-limited noise performance have been instrumental in enabling high fidelity readout of superconducting qubits and, recently, semiconductor quantum dots (QDs). We propose that the quantum capacitance arising in electronic two-level systems (the dual of Josephson inductance) can provide an alternative dissipationless nonlinear element for parametric amplification. We experimentally demonstrate phase-sensitive parametric amplification using a QD-reservoir electron transition in a CMOS nanowire split-gate transistor embedded in a 1.8 GHz superconducting lumped-element microwave cavity, achieving parametric gains of to , limited by Sisyphus dissipation. Using a semiclassical model, we find an optimized design within current technological capabilities could achieve gains and bandwidths comparable to JPAs, while providing complementary specifications with respect to integration in semiconductor platforms or operation at higher magnetic fields.
- Received 2 December 2021
- Accepted 30 March 2022
DOI:https://doi.org/10.1103/PhysRevLett.128.197701
© 2022 American Physical Society
Physics Subject Headings (PhySH)
synopsis
Parametric Amplification for Silicon Quantum Devices
Published 10 May 2022
A new design based on the quantum capacitance of a silicon quantum dot could enable scalable, high-fidelity qubit readout.
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