Quantum thermometry with an optomechanical system

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 op...

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Bibliographic Details
Published inarXiv.org
Main Authors Ullah, Asghar, Ali, Pedram, M Tahir Naseem, Müstecaplıoğlu, Özgür E
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.01.2024
Subjects
Clustering
Eigenvectors
Energy gap
Energy levels
Fisher information
Low temperature
Parameters
Resonators
Thermal baths
Thermometry
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Summary: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.
ISSN:2331-8422