Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session N50: Dynamical Phenomena with Floquet or Quasi-Periodic Driving
11:30 AM–2:30 PM,
Wednesday, March 16, 2022
Room: McCormick Place W-474A
Sponsoring
Unit:
DCMP
Chair: Aditi Mitra, NYU
Abstract: N50.00001 : Floquet Prethermalization with Lifetime Exceeding 90 s in a Bulk Hyperpolarized Solid*
11:30 AM–11:42 AM
Presenter:
William Beatrez
(University of California, Berkeley)
Authors:
William Beatrez
(University of California, Berkeley)
Otto Janes
(University of California, Berkeley)
Amala Akkiraju
(University of California, Berkeley)
Arjun Pillai
(University of California, Berkeley)
Alex Oddo
(University of California, Berkeley)
Paul Reshetikhin
(University of California, Berkeley)
Emanuel Druga
(University of California, Berkeley)
Maxwell McAllister
(University of California, Berkeley)
Mark Elo
(Tabor Electronics Inc.)
Benjamin Gilbert
(Lawrence Berkeley National Laboratory)
Dieter Suter
(Technische Universitä)
Ashok Ajoy
(University of California, Berkeley)
nuclei in diamond at room temperature. For precessing nuclear spins prepared in an initial transverse
state, we demonstrate Floquet control that prevents their decay over multiple-minute long periods. We observe
Floquet prethermal lifetimes T2'≈90.9s, extended >60,000-fold over the nuclear free induction decay times. The
spins themselves are continuously interrogated for ∼10min, corresponding to the application of ≈5.8M control
pulses. The 13C nuclei are optically hyperpolarized by lattice Nitrogen-Vacancy (NV) centers; the combination
of hyperpolarization and continuous spin readout yields significant signal-to-noise in the measurements. This
allows probing the Floquet thermalization dynamics with unprecedented clarity. We identify four characteristic
regimes of the thermalization process, discerning short-time transient processes leading to the prethermal
plateau, and long-time system heating towards infinite temperature. This work points to new opportunities
possible via Floquet control in networks of dilute, randomly distributed, low-sensitivity nuclei. In particular, the
combination of minutes-long prethermal lifetimes and continuous spin interrogation opens avenues for quantum
sensors constructed from hyperpolarized Floquet prethermal nuclei.
*This work was funded by ONR under contract N00014-20-1-2806.
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