Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session T52: Quantum Sensing with Defect Spin Sensors II
11:30 AM–2:06 PM,
Thursday, March 7, 2024
Room: 201AB
Sponsoring
Units:
DQI GMAG
Chair: Pragati Gupta, University of Calgary
Abstract: T52.00013 : Decoherence of the central spin in dissipative spin baths*
1:54 PM–2:06 PM
Presenter:
Mykyta Onizhuk
(University of Chicago)
Authors:
Mykyta Onizhuk
(University of Chicago)
Yuxin Wang
(University of Maryland, College Park)
Jonah Nagura
(University of Chicago)
Aashish A Clerk
(University of Chicago)
Giulia Galli
(University of Chicago)
To harness the potential of solid-state spin qubits for quantum sensing applications, it is critical to obtain a deep understanding of their intricate interactions with surface-bound spins.
This work presents a new methodology based on cluster correlation expansion to study how a central spin interacts with other spins in a dissipative bath. We tested the method on several model systems and found it faithfully reproduces reference numerical results.
Using the framework developed here, we identify a subtle interplay between dissipation and coherent spin exchange. Specifically, we find that fast dissipation in the bath can increase the coherence time of the central spin. Finally, we use our method to simulate nitrogen-vacancy (NV) centers close to a diamond surface, and we find that bath-induced dissipation is the main factor determining the NV center's decoherence in experimentally relevant regimes.
Our method holds promises to study the spin dynamics of defects in complex systems, thus providing a useful tool to understand the quantum behavior of the central spin in dissipative environments.
*This work has been supported by AFOSR
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