Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session F29: Semiconductor Qubits - Spin Qubit Read-out II
11:30 AM–2:30 PM,
Tuesday, March 16, 2021
Sponsoring
Unit:
DQI
Chair: Edward Chen, IBM Research - Almaden
Abstract: F29.00005 : Parametric Amplification in a CMOS Quantum Dot coupled to a Microwave Cavity*
12:42 PM–12:54 PM
Live
Presenter:
Laurence Cochrane
(Department of Engineering, University of Cambridge)
Authors:
Laurence Cochrane
(Department of Engineering, University of Cambridge)
Theodor Lundberg
(Cavendish Laboratory, University of Cambridge)
David J. Ibberson
(Quantum Engineering Technology Labs, University of Bristol)
Lisa A. Ibberson
(Hitachi Cambridge Laboratory)
Louis HUTIN
(CEA/LETI-MINATEC, CEA-Grenoble)
Maud Vinet
(CEA/LETI-MINATEC, CEA-Grenoble)
Ashwin A. Seshia
(Department of Engineering, University of Cambridge)
M Fernando Gonzalez-Zalba
(Quantum Motion Technologies)
We analyse through a semi-classical model and demonstrate experimentally parametric amplification using the tuneable tunnelling capacitance of a QD-reservoir electron transition in a CMOS nanowire split-gate transistor embedded in a 1.8 GHz superconducting spiral inductor microwave cavity. Pumping through one gate the QD-reservoir detuning at twice the cavity resonant frequency, while probing the hybrid QD-cavity in reflectometry, we achieve phase-sensitive (de)amplification of the reflection coefficient by (-)+3dB (cf. zero pump amplitude). The performance here was limited by the Sisyphus dissipation in the QD; however, we identify a clear path towards achieving gains comparable to JPAs using only the same devices already present for dispersive gate-based readout.
*EU Horizon 2020 R&I Programme, Grant 688539
L.C. - EPSRC Grant EP/L016567/1
T.L. - EPSRC Grant EP/L015978/1
D.J.I. - EPSRC Grant EP/L015730/1
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