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 G33: Floquet Systems
11:30 AM–2:18 PM,
Tuesday, March 7, 2023
Room: Room 225
Sponsoring
Unit:
DCMP
Chair: Nishant Agarwal, University of Massachusetts Lowell
Abstract: G33.00010 : Magnetic sensing employing non-equilibrium long-lived coherences in driven quantum spin ensembles*
1:18 PM–1:30 PM
Presenter:
Viatcheslav V Dobrovitski
(QuTech, Delft University of Technology, Delft, the Netherlands)
Authors:
Viatcheslav V Dobrovitski
(QuTech, Delft University of Technology, Delft, the Netherlands)
Will Schenken
(Department of Physics, University of California, Santa Barbara, USA)
Simon A Meynell
(Department of Physics, University of California, Santa Barbara, USA)
Ania C Bleszynski Jayich
(Department of Physics, University of California, Santa Barbara, USA)
We present theoretical design and analysis of control protocols which employ the long-lived coherences for quantum-assisted sensing of ac magnetic fields. In these protocols the direction of the control pulses periodically changes, inducing the long-lived oscillations with the frequency which depends on the magnitude of the ac magnetic field; the baseline of the oscillations also depends on the ac field, enabling two modalities of magnetic sensing. Theory shows that this approach is a promising alternative to the sensing methods based on more traditional dynamical decoupling techniques. Experimental results utilizing ensembles of dipolar interacting nitrogen vacancy centers in diamond are presented.
[1] Y. Dong et al, Phys. Rev. Lett. 100, 247601 (2008).
[2] W. Hahn and V. V. Dobrovitski, New J. Phys. 23 073029 (2021).
*This work was supported by Dutch Research Council (NWO) and by DARPA DRINQS program.
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