The dimensionality of a thermometer is key in the design of quantum thermometry schemes. In general,the phenomenology that is typical of qubit-based quantum thermometry does not apply to infinite-dimensionalones. We analyze the dynamical and metrological features of nonequilibrium Gaussian quantum thermometers:On one hand, we highlight how quantum entanglement can enhance the readiness of composite Gaussianthermometers; on the other hand, we show that nonequilibrium conditions do not guarantee the best sensitivitiesin temperature estimation, thus suggesting the reassessment of some of the working principles underpinningquantum thermometry.

Nonequilibrium readiness and precision of Gaussian quantum thermometers / L. Mancino, M.G. Genoni, M. Barbieri, M. Paternostro. - In: PHYSICAL REVIEW RESEARCH. - ISSN 2643-1564. - 2:3(2020 Sep 23), pp. 033498.033498.1-033498.033498-8. [10.1103/PhysRevResearch.2.033498]

Nonequilibrium readiness and precision of Gaussian quantum thermometers

M.G. Genoni
Secondo
;
2020

Abstract

The dimensionality of a thermometer is key in the design of quantum thermometry schemes. In general,the phenomenology that is typical of qubit-based quantum thermometry does not apply to infinite-dimensionalones. We analyze the dynamical and metrological features of nonequilibrium Gaussian quantum thermometers:On one hand, we highlight how quantum entanglement can enhance the readiness of composite Gaussianthermometers; on the other hand, we show that nonequilibrium conditions do not guarantee the best sensitivitiesin temperature estimation, thus suggesting the reassessment of some of the working principles underpinningquantum thermometry.
Settore FIS/03 - Fisica della Materia
23-set-2020
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/776076
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