Experimental test of fluctuation relations for driven open quantum systems with an NV center

Year: 2021

Authors: Hernandez-Gomez S., Staudenmaier N., Campisi M., 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; Consiglio Nazl Ric CNR INO, Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy; CNR, Ist Nanosci, NEST, I-56127 Pisa, Italy; Scuola Normale Super Pisa, I-56127 Pisa, Italy; Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy; Ulm Univ, Inst Quantum Opt, D-89081 Ulm, Germany.

Abstract: The experimental verification of quantum fluctuation relations for driven open quantum system is currently a challenge, due to the conceptual and operative difficulty of distinguishing work and heat. The nitrogen-vacancy (NV) center in diamond has been recently proposed as a controlled test bed to study fluctuation relations in the presence of an engineered dissipative channel, in absence of work (Hernbndez-Gumez et al 2020 Phys. Rev. Res. 2 023327). Here, we extend those studies to exploring the validity of quantum fluctuation relations in a driven-dissipative scenario, where the spin exchanges energy both with its surroundings because of a thermal gradient, and with an external work source. We experimentally prove the validity of the quantum fluctuation relations in the presence of cyclic driving in two cases, when the spin exchanges energy with an effective infinite-temperature reservoir, and when the total work vanishes at stroboscopic times – although the power delivered to the NV center is non-null. Our results represent the first experimental study of quantum fluctuation relation in driven open quantum systems.

Journal/Review: NEW JOURNAL OF PHYSICS

Volume: 23 (6)      Pages from: 065004-1  to: 065004-12

KeyWords: quantum thermodynamics; quantum fluctuation relations; nitrogen vacancy centers in diamond; open quantum systems
DOI: 10.1088/1367-2630/abfc6a

Citations: 24
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