Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session W53: Advances in Surface Electrons in Quantum Computing
3:00 PM–5:24 PM,
Thursday, March 7, 2024
Room: 202AB
Sponsoring
Unit:
DQI
Chair: Gerwin Koolstra, EeroQ
Abstract: W53.00009 : High Quality Two Layer LC Resonator at Liquid Helium Temperature*
4:36 PM–4:48 PM
Presenter:
Weiheng Fu
(Princeton University)
Authors:
Weiheng Fu
(Princeton University)
Stephen A Lyon
(Princeton, EeroQ Corp.)
Electrons on liquid Helium is a promising platform for quantum information processing. Vertically bound by its image charge and the Pauli exclusion principle, electrons form a 2D electron gas in vacuum above the smooth superfluid He. Analogous to a plunger gate in silicon qubits, we need a conductive layer underneath the inductor to trap electrons near it without damaging the quality factor. We explore such a structure using a two-layer lumped element LC resonator which has a measured quality factor of 1700 at 4.2K. The device consists of a superconducting Nb layer on top with a highly resistive NbSi layer underneath used for applying a DC bias to trap electrons on the surface. To maximize spin-resonator coupling, we minimize the resonator impedance and observe no change in quality factor when varying potentials between the top Nb layer and bottom NbSi layer.
*Supported in part by the Princeton University and the DOE under grants DE-SC0012704 and DE-AC02-05CH11231.
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