Autonomous Dissipative Maxwell?s Demon in a Diamond Spin Qutrit

Year: 2022

Authors: Hernandez-Gomez S.; Gherardini S.; Staudenmaier N.; Poggiali F.; Campisi M.; Trombettoni A.; Cataliotti F.S.; Cappellaro P.; Fabbri N.

Autors Affiliation: Univ Firenze, European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy; Inst Nazl Ott Consiglio Nazl Ric CNR INO, I-50019 Sesto Fiorentino, Italy; Scuola Internazl Super Studi Avanzati SISSA, I-34136 Trieste, Italy; Ist Nazl Ott Consiglio Nazl Ric CNR INO, I-34149 Trieste, Italy; Ist Nanosci CNR, NEST, I-56127 Pisa, Italy; Scuola Normale Super Pisa, I-56127 Pisa, Italy; CNR IOM DEMOCRITOS Simulat Ctr, I-34136 Trieste, Italy; MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA; MIT, Dept Phys, Cambridge, MA 02139 USA; Ulm Univ, Inst Quantum Opt, D-89081 Ulm, Germany.

Abstract: Engineered dynamical maps combining coherent and dissipative transformations of quantum states with quantum measurements have demonstrated a number of technological applications, and promise to be a crucial tool in quantum thermodynamic processes. Here we exploit the control on the effective open spin qutrit dynamics of a nitrogen-vacancy center to experimentally realize an autonomous feedback process (Maxwell?s demon) with tunable dissipative strength. The feedback is enabled by random measurement events that condition the subsequent dissipative evolution of the qutrit. The efficacy of the autonomous Maxwell?s demon is quantified by means of a generalized Sagawa-Ueda-Tasaki relation for dissipative dynamics. To achieve this, we experimentally characterize the fluctuations of the energy exchanged between the system and its the environment. This opens the way to the implementation of a new class of Maxwell?s demons, which could be useful for quantum sensing and quantum thermodynamic devices.

Journal/Review: PRX QUANTUM

Volume: 3 (2)      Pages from: 020329-1  to: 020329-15

More Information: We gratefully thank Massimo Inguscio for enlightening discussions. We acknowledge financial support from the MISTI Global Seed Funds MIT-FVG Collaboration Grant and from the European Union´s 2020 research and innovation program Qombs Project (FET Flagship on Quantum Technologies Grant No. 820419). S.G. also acknowledges the Blanceflor Foundation for financial support through the project entitled “The Thermodynamics behind the Measurement Postulate of Quantum Mechanics” (TRIESTE). S.H.G. acknowledges the financial support from CNRFOE-LENS-2020.
KeyWords: QUANTUM; COMPUTATION; COLLOQUIUM; STATE
DOI: 10.1103/PRXQuantum.3.020329

Citations: 16
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