The act of measuring a system has profound consequences of dynamical and thermodynamic nature. In particular, the degree of irreversibility ensuing from a nonequilibrium process is strongly affected by measurements aimed at acquiring information on the state of a system of interest: the conditional and unconditional entropy production, which quantify the degree of irreversibility of the open system's dynamics, are related to each other by clearly interpreted informational quantities. Building on a recently proposed collisional model framework [G. T. Landi, M. Paternostro, and A. Belenchia, PRX Quantum 3, 010303 (2022)10.1103/PRXQuantum.3.010303], we investigate the case of continuous-variable information carriers prepared in Gaussian states and undergoing Gaussian processes. We build up a toolbox that fully characterizes the thermodynamics of continuously measured nonequilibrium Gaussian systems and processes, illustrating how the instruments hereby introduced provide key insight into recent experiments on mesoscopic quantum systems [M. Rossi, L. Mancino, G. T. Landi, M. Paternostro, A. Schliesser, and A. Belenchia, Phys. Rev. Lett. 125, 080601 (2020)10.1103/PhysRevLett.125.080601].

Belenchia A., Paternostro M., Landi G.T. (2022). Informational steady states and conditional entropy production in continuously monitored systems: The case of Gaussian systems. PHYSICAL REVIEW A, 105(2) [10.1103/PhysRevA.105.022213].

Informational steady states and conditional entropy production in continuously monitored systems: The case of Gaussian systems

Paternostro M.
Co-ultimo
Writing – Original Draft Preparation
;
2022-02-22

Abstract

The act of measuring a system has profound consequences of dynamical and thermodynamic nature. In particular, the degree of irreversibility ensuing from a nonequilibrium process is strongly affected by measurements aimed at acquiring information on the state of a system of interest: the conditional and unconditional entropy production, which quantify the degree of irreversibility of the open system's dynamics, are related to each other by clearly interpreted informational quantities. Building on a recently proposed collisional model framework [G. T. Landi, M. Paternostro, and A. Belenchia, PRX Quantum 3, 010303 (2022)10.1103/PRXQuantum.3.010303], we investigate the case of continuous-variable information carriers prepared in Gaussian states and undergoing Gaussian processes. We build up a toolbox that fully characterizes the thermodynamics of continuously measured nonequilibrium Gaussian systems and processes, illustrating how the instruments hereby introduced provide key insight into recent experiments on mesoscopic quantum systems [M. Rossi, L. Mancino, G. T. Landi, M. Paternostro, A. Schliesser, and A. Belenchia, Phys. Rev. Lett. 125, 080601 (2020)10.1103/PhysRevLett.125.080601].
22-feb-2022
Settore FIS/03 - Fisica Della Materia
Belenchia A., Paternostro M., Landi G.T. (2022). Informational steady states and conditional entropy production in continuously monitored systems: The case of Gaussian systems. PHYSICAL REVIEW A, 105(2) [10.1103/PhysRevA.105.022213].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/614517
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