We investigate the phenomenology leading to the non-conservation of energy of the continuous spontaneous localization (CSL) model from the viewpoint of non-equilibrium thermodynamics, and use such framework to assess the equilibration process entailed by the dissipative formulation of the model (dCSL). As a paradigmatic situation currently addressed in frontier experiments aimed at investigating possible collapse theories, we con- sider a one-dimensional mechanical oscillator in a thermal state. We perform our analysis in the phase space of the oscillator, where the entropy production rate, a non-equilibrium quantity used to characterize irreversibility, can be conveniently analyzed. We show that the CSL model violates Clausius law, as it exhibits a negative entropy production rate, while the dCSL model reaches equilibrium consistently only under certain dynamical conditions, thus allowing us to identify the values – in the parameter space – where the latter mechanism can be faithfully used to describe a thermodynamically consistent phenomenon.

Simone Artini, Mauro Paternostro (2023). Characterizing the spontaneous collapse of a wavefunction through entropy production. NEW JOURNAL OF PHYSICS.

Characterizing the spontaneous collapse of a wavefunction through entropy production

Simone Artini
Primo
;
Mauro Paternostro
Ultimo
Supervision
2023-12-13

Abstract

We investigate the phenomenology leading to the non-conservation of energy of the continuous spontaneous localization (CSL) model from the viewpoint of non-equilibrium thermodynamics, and use such framework to assess the equilibration process entailed by the dissipative formulation of the model (dCSL). As a paradigmatic situation currently addressed in frontier experiments aimed at investigating possible collapse theories, we con- sider a one-dimensional mechanical oscillator in a thermal state. We perform our analysis in the phase space of the oscillator, where the entropy production rate, a non-equilibrium quantity used to characterize irreversibility, can be conveniently analyzed. We show that the CSL model violates Clausius law, as it exhibits a negative entropy production rate, while the dCSL model reaches equilibrium consistently only under certain dynamical conditions, thus allowing us to identify the values – in the parameter space – where the latter mechanism can be faithfully used to describe a thermodynamically consistent phenomenon.
13-dic-2023
Settore FIS/03 - Fisica Della Materia
Simone Artini, Mauro Paternostro (2023). Characterizing the spontaneous collapse of a wavefunction through entropy production. NEW JOURNAL OF PHYSICS.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/619653
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