Scientific Results

Bridging thermodynamics and metrology in nonequilibrium quantum thermometry

Year: 2018

Authors: Cavina V., Mancino L., De Pasquale A., Gianani I., Sbroscia M., Booth R.I., Roccia E., Raimondi R., Giovannetti V., Barbieri M.

Autors Affiliation: NEST, Scuola Normale Super, Piazza Cavalieri 7, I-56126 Pisa, Italy; Ist Nanosci CNR, Piazza Cavalieri 7, I-56126 Pisa, Italy; Univ Roma Tre, Dipartimento Sci, Via Vasca Navale 84, I-00146 Rome, Italy; Univ Firenze, Dipartimento Fis, Via G Sansone 1, I-50019 Sesto Fiorentino, FI, Italy; INFN Sez Firenze, Via G Sansone 1, I-50019 Sesto Fiorentino, FI, Italy; Sorbonne Univ, Inst Phys, 4 Pl Jussieu, F-75005 Paris, France; Ist Nazl Ottica CNR, Largo Enr Fermi 6, I-50125 Florence, Italy.

Abstract: Single-qubit thermometry presents the simplest tool to measure the temperature of thermal baths with reduced invasivity. At thermal equilibrium, the temperature uncertainty is linked to the heat capacity of the qubit, however, the best precision is achieved outside the equilibrium condition. Here, we discuss a way to generalize this relation in a nonequilibrium regime, taking into account purely quantum effects such as coherence. We support our findings with an experimental photonic simulation.

Journal/Review: PHYSICAL REVIEW A

Volume: 98 (5)      Pages from: 050101-1  to: 050101-5

KeyWords: single-qubit thermometry
DOI: 10.1103/PhysRevA.98.050101

Citations: 6
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English