Repeated temperature measurements in quantum thermodynamics
Quantum Physics
2026-04-03 v2
Abstract
In this work, we model the temperature measurement as a transformation of the arbitrary state into the Gibbs state. We start with a general formalism of ansatz-posteriors, which includes many usual models of posterior states due to measurement or state preparation. On the one hand, it contains models of selective and non-selective measurements posteriors as special cases, which allows us to consider it as a generalization of usual measurement models. On the other hand, it contains the above mentioned transformation into the Gibbs state as a special case as well. We derive an analogue of the master equation in the stroboscopic limit of repeated measurements. Then we apply our general approach to temperature measurement.
Cite
@article{arxiv.2504.14312,
title = {Repeated temperature measurements in quantum thermodynamics},
author = {N. M. Gerasimov and A. E. Teretenkov},
journal= {arXiv preprint arXiv:2504.14312},
year = {2026}
}