Energetics and quantumness of Fano coherence generation
Anno: 2024
Autori: Donati L., Cataliotti F.S., Gherardini S.
Affiliazione autori: Ist Nazl Ott INO, Consiglio Nazl Ric CNR, Largo Enrico Fermi 6, I-50125 Florence, Italy; Univ Firenze, European Lab Nonlinear Spect, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Dipartimento Fis & Astron, Via Sansone 1, I-50019 Sesto Fiorentino, Italy.
Abstract: In a multi-level quantum system Fano coherences stand for the formation of quantum coherences due to the interaction with the continuum of modes characterizing an incoherent process. In this paper we propose a V-type three-level quantum system on which we certify the presence of genuinely quantum traits underlying the generation of Fano coherences. We do this by determining work conditions that allows for the loss of positivity of the Kirkwood-Dirac quasiprobability distribution of the stochastic energy changes within the discrete system. We also show the existence of nonequilibrium regimes where the generation of Fano coherences leads to a non-negligible excess energy given by the amount of energy that is left over with respect to the energy of the system at the beginning of the transformation. Excess energy is attained provided the initial state of the discrete system is in a superposition of the energy eigenbasis. We conclude the paper by studying the thermodynamic efficiency of the whole process.
Giornale/Rivista: SCIENTIFIC REPORTS
Volume: 14 (1) Da Pagina: 20145-1 A: 20145-17
Maggiori informazioni: We wish to acknowledge financial support from the project PRIN 2022 Quantum Reservoir Computing (QuReCo), and the PNRR MUR project PE0000023-NQSTI financed by the European Union-Next Generation EU.
Parole chiavi: Fano coherence; Quantum photocell; Quantum thermodynamics; Work extraction enhancement; Thermodynamic efficiency
DOI: 10.1038/s41598-024-67037-2
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