Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session W49: Defect Qubits IV - Rare Earth Ions for Quantum Networking
3:00 PM–5:12 PM,
Thursday, March 7, 2024
Room: 200G
Sponsoring
Unit:
DQI
Chair: Leon Zaporski
Abstract: W49.00011 : Spin qubit with coherence exceeding one second measured by microwave photon counting. Part 3/3*
5:00 PM–5:12 PM
Presenter:
Jaime Travesedo
(CEA)
Authors:
Jaime Travesedo
(CEA)
Louis P Pallegoix
(CEA Saclay)
James O'Sullivan
(CEA Saclay)
Patrice Bertet
(CEA Saclay)
Emmanuel Flurin
(CEA-Saclay)
Collaboration:
Quantronics, Chimie ParisTech, IM2NP, Institut Néel
Using single-electron-spin-resonance techniques recently demonstrated [3] we characterize the magnetic environment of the single electron probe. The technique consists in measuring the spin fluorescence signal at microwave frequencies [1, 2] using a microwave photon counter based on a superconducting transmon qubit [3]. In our experiment, individual paramagnetic erbium ions in a scheelite crystal of CaWO4 are magnetically coupled to a small-mode-volume, high-quality factor superconducting microwave resonator to enhance their radiative decay rate [4]. The method applies to arbitrary paramagnetic species with long enough non-radiative relaxation time, and offers large detection volumes ( ∼ 10μm3) ; as such, it may find applications in magnetic resonance and quantum computing.
The third part of this talk will present the mechanisms by which the electron spin couples to the magnetic environment and discuss the techniques used to detect and characterize said environment.
[1] Albertinale, E. et al. Detecting spins by their fluorescence with am microwave photon counter. Nature 600, 434– 438 (2021).
[2] L. Balembois, et al. Practical Single Microwave Photon Counter with 10−22 W/√Hz sensitivity. arXiv :2307.03614.
[3] Z. Wang, et al. Single-electron spin resonance detection by microwave photon counting. Nature 619, 276–281 (2023).
[4] R. Lescanne et al. Irreversible Qubit-Photon Coupling for the Detection of Itinerant Microwave Photons. Phys. Rev. X 10, 021038 (2020).
[5] A. Bienfait et al. Controlling spin relaxation with a cavity. Nature 531, 74 (2016).
*We acknowledge support from the European Research Council under grant no. 101042315 (INGENIOUS).
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