Bulletin of the American Physical Society
2023 APS March Meeting
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: D71.00007 : Quantum measurement of RF resonators to search for axion dark matter below 300 MHz*
4:12 PM–4:48 PM
Presenter:
Kent D Irwin
(Stanford Univ)
Authors:
Kent D Irwin
(Stanford Univ)
Elizabeth C van Assendelft
(Stanford University)
Chelsea Bartram
(SLAC National Accelerator Laboratory)
Saptarshi Chaudhuri
(Princeton University)
Hsiao-Mei Cho
(SLAC National Accelerator Laboratory)
Jason Y Corbin
(Stanford University)
Stephen Kuenstner
(Stanford University)
Dale Li
(SLAC - Natl Accelerator Lab)
Nicholas M Rapidis
(Stanford Univ)
Chiara Salemi
(Stanford University)
Maria Simanovskaia
(Stanford University)
Jyotirmai Singh
(Stanford Univ)
Betty Young
(Santa Clara University)
At MHz frequencies, Fock state measurements and photon counting are not optimal sensing techniques because of contamination with thermal photons, but backaction evasion (BAE) can provide significant sensitivity improvement when detuned from the resonance. I will discuss the use of BAE with both single electromagnetic RF resonators and networked RF resonators. These techniques utilize the RF quantum upconverter (RQU), a multi-junction Josephson interferometer that couples MHz signals to microwave superconducting resonators, enabling both phase-insensitive measurement near the SQL and phase-sensitive techniques including BAE that can surpass the measurement sensitivity of an SQL amplifier.
I discuss the application of networked resonators to enhance axion detection, including coherently coupling two resonators (each with two quadratures), and applying BAE to delocalized measurement quadratures. This may be realized by coupling two networked RF resonators with frequencies near a MHz to a single microwave electromagnetic mode.
*This material is based upon work supported by Q-NEXT, one of the U.S. Department of Energy Office of Science National Quantum Information Science Research Centers.
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