Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session X09: Open Quantum Systems
8:00 AM–9:48 AM,
Friday, June 4, 2021
Chair: Jason Kestner, UMBC
Abstract: X09.00004 : Non-thermal energy fluctuations of a qutrit under feedback-controlled dissipative dynamics
8:36 AM–8:48 AM
Live
Presenter:
Santiago Hernández Gómez
(LENS/University of Florence and INO-CNR)
Authors:
Santiago Hernández Gómez
(LENS/University of Florence and INO-CNR)
Stefano Gherardini
(LENS/University of Florence and SISSA)
Francesco Poggiali
(LENS/University of Florence)
Nicolas Staudenmaier
(LENS/University of Florence)
Michele Campisi
(University of Florence and NEST-CNR-NANO and INFN)
Andrea Trombettoni
(CNR-IOM and SISSA)
Francesco Cataliotti
(LENS/University of Florence and INO-CNR)
Paola Cappellaro
(Massachusetts Institute of Technology MIT)
Nicole Fabbri
(LENS/University of Florence and INO-CNR)
We characterize the energy exchange fluctuations of a diamond spin qutrit in contact with an engineered non-thermal reservoir realized by the interaction with short laser pulses. The spin dynamics is well described as an intrinsic feedback process where dissipation is conditioned by measurement, and –as opposed to two-level systems– produces utterly quantum (non-thermal) out-of-equilibrium steady states. We were able to experimentally verify the validity of the general quantum fluctuation relation in a dissipative scenario, and quantify the efficacy of the measurements and dissipation in opening the system. We also show that this efficacy can be used as a measure of non-unitality of the map.
This represents the first experimental verification of quantum fluctuation relations in an open quantum system under a non-microreversible dynamics.
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