Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

picture of me

Patrick Potts

Postdoctoral fellow

picture of me

Quantum Thermal Machine as a Thermometer

Author

  • Patrick P. Hofer
  • Jonatan Bohr Brask
  • Martí Perarnau-Llobet
  • Nicolas Brunner

Summary, in English

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.

Publishing year

2017-09-01

Language

English

Publication/Series

Physical Review Letters

Volume

119

Issue

9

Document type

Journal article

Publisher

American Physical Society

Status

Published

ISBN/ISSN/Other

  • ISSN: 0031-9007