Quantum thermometry with an optomechanical system
Abstract
We present a quantum thermometry method utilizing an optomechanical system composed of an optical field coupled to a mechanical resonator for measuring the unknown temperature of a thermal bath. To achieve this, we connect a thermal bath to the mechanical resonator and perform measurements on the optical field, serving as a probe thermometer. Using the open quantum systems approach, we numerically calculate the quantum Fisher information for the probe. We find that, in specific parameter regimes, the system exhibits clusters of densely packed energy eigenstates interspaced with substantial energy gaps. This clustering of energy levels results in quasi-degeneracy within these energy eigenstate groups and hence widens the operational range of temperature estimation. Moreover, thermal sensitivity, especially at low temperatures, can be further boosted by appropriately tuning the essential system parameters.
Cite
@article{arxiv.2312.15691,
title = {Quantum thermometry with an optomechanical system},
author = {Asghar Ullah and Ali Pedram and M. Tahir Naseem and Özgür E. Müstecaplıoğlu},
journal= {arXiv preprint arXiv:2312.15691},
year = {2024}
}
Comments
The paper is being withdrawn because the model presented contains inaccuracies that require significant revision. A corrected version may be resubmitted at a later time