2023
DOI: 10.1098/rspa.2023.0040
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Thermodynamics of decoherence

Abstract: We investigate the non-equilibrium thermodynamics of pure decoherence. In a pure decoherence process, the system Hamiltonian is a constant of motion and there is no direct energy exchange between the system and its surroundings. Nevertheless, the environment’s energy is not generally conserved and in this work we show that this leads to non-trivial heat dissipation as a result of decoherence alone. This heat has some very distinctive properties: it obeys an integral fluctuation relation and can be interpreted … Show more

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Cited by 7 publications
(3 citation statements)
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“…As a consequence, during the initial part of the dynamics there is always a trade-off between the two quantities: to increase the accuracy we must allow the sample to absorb heat. The absorbed heat is always positive for this model [45], but in general it has a nonmonotonic behaviour in time, as highlighted, e.g., by the curve in panel (b1) for s = 3. However, Q(t) settles to a finite asymptotic value lim t→∞ Q(t) ∝ λ 2 ω C .…”
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confidence: 69%
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“…As a consequence, during the initial part of the dynamics there is always a trade-off between the two quantities: to increase the accuracy we must allow the sample to absorb heat. The absorbed heat is always positive for this model [45], but in general it has a nonmonotonic behaviour in time, as highlighted, e.g., by the curve in panel (b1) for s = 3. However, Q(t) settles to a finite asymptotic value lim t→∞ Q(t) ∝ λ 2 ω C .…”
mentioning
confidence: 69%
“…Since the probe does not dissipate energy, one may think that the thermodynamic features of the model may be trivial. However, external work is needed to couple and decouple the probe and the sample so that heat is dissipated into the environment [44][45][46], perturbing the sample from its initial state of thermal equilibrium.…”
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confidence: 99%
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