Quantum Thermal Machine as a Thermometer

Hofer, Patrick P. and Brask, Jonatan Bohr and Perarnau-Llobet, Marti and Brunner, Nicolas. (2017) Quantum Thermal Machine as a Thermometer. Physical Review Letters, 119 (9). 090603.

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Official URL: https://edoc.unibas.ch/82992/

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We propose the use of a quantum thermal machine for low-temperature thermometry. A hot thermal reservoir coupled to the machine allows for simultaneously cooling the sample while determining its temperature without knowing the model-dependent coupling constants. In its most simple form, the proposed scheme works for all thermal machines that perform at Otto efficiency and can reach Carnot efficiency. We consider a circuit QED implementation that allows for precise thermometry down to ∼15  mK with realistic parameters. Based on the quantum Fisher information, this is close to the optimal achievable performance. This implementation demonstrates that our proposal is particularly promising in systems where thermalization between different components of an experimental setup cannot be guaranteed.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretical Quantum Physics (Potts)
UniBasel Contributors:Potts, Patrick
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:11 May 2021 08:42
Deposited On:11 May 2021 08:42

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