期刊
PHYSICAL REVIEW A
卷 86, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.86.012125
关键词
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资金
- Italy's Ministry of Education, University, and Research (MIUR) [FIRB-RBFR10YQ3H-LiCHIS]
- United Kingdom Engineering and Physical Sciences Research Council [EP/G04759/1]
- Alexander von Humboldt Stiftung
- Engineering and Physical Sciences Research Council [EP/G004579/1] Funding Source: researchfish
- EPSRC [EP/G004579/1] Funding Source: UKRI
We use the theory of quantum estimation in two different qubit-boson coupling models to demonstrate that the temperature of a quantum harmonic oscillator can be estimated with high precision by quantum-limited measurements on the qubit. The two models that we address embody situations of current physical interest due to their connection with ongoing experimental efforts on the control of mesoscopic dynamics. We show that population measurements performed over the qubit probe are near optimal for a broad range of temperatures of the harmonic oscillator.
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