Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D71: Quantum Sensing in Cryogenic Environments
3:00 PM–5:48 PM,
Monday, March 6, 2023
Room: Room 407/408
Sponsoring
Unit:
DQI
Chair: Leonardo Ranzani, Raytheon BBN Technologies
Abstract: D71.00005 : Fabrication of Radio-Frequency Quantum Upconverters with Double-Angle Aluminum Junctions*
3:48 PM–4:00 PM
Presenter:
Jason Y Corbin
(Stanford University)
Authors:
Jason Y Corbin
(Stanford University)
Chelsea Bartram
(SLAC - National Accelerator Lab)
Saptarshi Chaudhuri
(Princeton University)
Hsiao-Mei Cho
(SLAC National Accelerator Lab)
Stephen Kuenstner
(Stanford University)
Dale Li
(SLAC - National Accelerator Lab)
Nicholas M Rapidis
(Stanford University)
Chiara Salemi
(Stanford University)
Maria Simanovskaia
(Stanford University)
Jyotirmai Singh
(Stanford University)
Elizabeth C van Assendelft
(Stanford University)
Betty Young
(Santa Clara University)
Kent D Irwin
(Stanford University)
We describe the fabrication of the radio-frequency quantum upconverter (RQU), a superconducting device that uses the flux-sensitive inductance of a three-junction interferometer to couple low-frequency electromagnetic signals (5 kHz - 30 MHz) into sidebands on high frequency carrier waves (4-6 GHz). RQUs can utilize a variety of quantum protocols to reduce noise below the Standard Quantum Limit in the 5 kHz-30 MHz range and achieve quantum-enhanced sensitivity. This talk will cover the physics and design of RQUs, and focus on the fabrication of RQUs using a double-angle aluminum deposition method, with nominal junction overlap regions of 0.5-5 μm2 and critical currents of 0.5-5 μA.
*This material is supported by the U.S. Department of Energy (DOE), Office of Science, Office of High Energy Physics (HEP), QuantISED program under FWP 100495. Jason Corbin is supported by the High Energy Physics Consortium for Advanced Training (HEPCAT), which is funded by the DOE, Office of HEP (award number: DE-SC0022313). We would also like to acknowledge the Stanford Nanofabrication Facility and Safavi-Naeini group for providing facilities and guidance for this project.
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