Quantum Thermal Machine as a Thermometer
| Autor: | Jonatan Bohr Brask, Patrick P. Hofer, Martí Perarnau-Llobet, Nicolas Brunner |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Coupling constant Quantum Physics Thermal reservoir Condensed Matter - Mesoscale and Nanoscale Physics General Physics and Astronomy Thermodynamics FOS: Physical sciences 7. Clean energy 01 natural sciences 010305 fluids & plasmas symbols.namesake Thermalisation Simple (abstract algebra) Thermometer 0103 physical sciences Thermal Mesoscale and Nanoscale Physics (cond-mat.mes-hall) symbols Electronic engineering 010306 general physics Carnot cycle Quantum Physics (quant-ph) Quantum |
| Zdroj: | Physical Review Letters |
| ISSN: | 1079-7114 |
| Popis: | 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 which perform at Otto efficiency and can reach Carnot efficiency. We consider a circuit QED implementation which allows for precise thermometry down to $\sim$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. Main text: 5 pages, 4 figures; Supplement: 5 pages |
| Databáze: | OpenAIRE |
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