Nonequilibrium readiness and precision of Gaussian quantum thermometers

Anno: 2020

Autori: Mancino L., Genoni MG., Barbieri M., Paternostro M.

Affiliazione autori: Queens Univ, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim, North Ireland; Univ Milan, Dipartimento Fis, Quantum Technol Lab, I-20133 Milan, Italy; Univ Roma Tre, Dipartimento Sci, Via Vasca Navale 84, I-00146 Rome, Italy; CNR, INO, I-50125 Florence, Italy.

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.

Giornale/Rivista: PHYSICAL REVIEW RESEARCH

Volume: 2 (3)      Da Pagina: 33498-1  A: 33498-8

Maggiori informazioni: The authors would like to thank Antonella De Pasquale, Gabriele De Chiara, Gabriel Landi, Obinna Abah, Michele Maria Feyles, and Federico Centrone for stimulating discussions. L.M. acknowledges the hospitality of Universita degli Studi Roma Tre, where part of this work was carried out. The authors acknowledge financial support from H2020-FETOPEN-2018-2020 project TEQ (Grant No. 766900), the DfE-SFI Investigator Programme (Grant No. 15/IA/2864), COST Action CA15220 and UK ESPRC (No. EP/T028106/1), the Royal Society Wolfson Research Fellowship (Grant No. RSWFR3183013), the Royal Society International Exchanges Programme (Grant No. IECR2192220), the Leverhulme Trust Research Project Grant (Grant No. RGP-2018-266), the UK EPSRC (No. EP/T028106/1), the Angelo Della Riccia Foundation (Royal Decree 19.7.41. No. 979, Florence), and MIUR, Rita Levi-Montalcini Fellowship.
Parole chiavi: Gaussian distribution; Quantum entanglement
DOI: 10.1103/PhysRevResearch.2.033498

Citazioni: 17
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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