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-dimensional ones. 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 Gaussian thermometers; on the other hand, we show that nonequilibrium conditions do not guarantee the best sensitivities in temperature estimation, thus suggesting the reassessment of some of the working principles underpinning quantum thermometry.

Mancino L., Genoni M.G., Barbieri M., Paternostro M. (2020). Nonequilibrium readiness and precision of Gaussian quantum thermometers. PHYSICAL REVIEW RESEARCH, 2(3) [10.1103/PhysRevResearch.2.033498].

Nonequilibrium readiness and precision of Gaussian quantum thermometers

Paternostro M.
Ultimo
Formal Analysis
2020-09-25

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-dimensional ones. 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 Gaussian thermometers; on the other hand, we show that nonequilibrium conditions do not guarantee the best sensitivities in temperature estimation, thus suggesting the reassessment of some of the working principles underpinning quantum thermometry.
25-set-2020
Settore FIS/03 - Fisica Della Materia
Mancino L., Genoni M.G., Barbieri M., Paternostro M. (2020). Nonequilibrium readiness and precision of Gaussian quantum thermometers. PHYSICAL REVIEW RESEARCH, 2(3) [10.1103/PhysRevResearch.2.033498].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/627493
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