MRS Meetings and Events

 

EQ07.03.02 2022 MRS Fall Meeting

Control and Sensing of Dark-Spin Bath Polarization via a Single Probe Qubit

When and Where

Nov 28, 2022
3:15pm - 3:30pm

Sheraton, 2nd Floor, Independence East

Presenter

Co-Author(s)

Yuxin Wang1,Mykyta Onizhuk1,Jonathan Marcks1,Benjamin Soloway1,Paul Jerger1,Nazar Delegan2,1,F. Heremans2,1,David Awschalom1,2,Giulia Galli1,2,Aash Clerk1

The University of Chicago1,Argonne National Laboratory2

Abstract

Yuxin Wang1,Mykyta Onizhuk1,Jonathan Marcks1,Benjamin Soloway1,Paul Jerger1,Nazar Delegan2,1,F. Heremans2,1,David Awschalom1,2,Giulia Galli1,2,Aash Clerk1

The University of Chicago1,Argonne National Laboratory2
The central spin model, where a single qubit interacts with a collection of neighboring bath spins, provides a paradigmatic model for understanding qubit decoherence in a great variety of quantum platforms ranging from superconducting circuits to solid state defect spins. It is common to treat such spin environment as a classical fluctuating noise source, which can be readily characterized using standard qubit noise spectroscopy techniques. However, a realistic spin bath forms a dynamical object that can be perturbed by evolution of the central spin. Here, we theoretically propose techniques that utilize a single qubit to both polarize and probe its surrounding spin bath. Making use of an effective quench induced by the qubit onto the bath [1], we further show how our method allows a model-free estimation of the effective bath temperature. We discuss how our protocols can be directly implemented using a single NV center spin qubit in diamond, which can interact with either <sup>13</sup>C nuclear spins or substitutional nitrogen electron spins (P1 centers). We also present numerical calculations based on cluster correlation expansion (CCE) to benchmark our protocols’ performance.<br/><br/>[1] Y.-X. Wang, A. A. Clerk, Nat. Commun. <b>12</b>, 6528 (2021).

Symposium Organizers

Anke Krueger, Stuttgart University
Philippe Bergonzo, Seki Diamond Systems
Chia-Liang Cheng, National Dong Hwa University
Mariko Suzuki, University of Cádiz

Symposium Support

Silver
MUEGGE GmbH
Seki Diamond Systems

Bronze
Applied Diamond, Inc.
EDP Corporation
Fine Abrasives Taiwan CO., LTD.
Fraunhofer USA, Inc.
Qnami AG

Publishing Alliance

MRS publishes with Springer Nature