Dynamical role of quantum signatures in quantum thermometry

Year: 2019

Authors: Feyles M.M., Mancino L., Sbroscia M., Gianani I., Barbieri M.

Autors Affiliation: Sapienza Univ Roma, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome, Italy; Queens Univ Belfast, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim, North Ireland; Univ Roma Tre, Dipartimento Sci, Via Vasca Navale 84, I-00146 Rome, Italy; CNR, Ist Nazl Ott, Largo Enrico Fermi 6, I-50125 Florence, Italy

Abstract: Nonequilibrium quantum thermometry is a central topic for both fundamental and technological purposes. It shows advantages against its equilibrium counterpart by reducing the uncertainty associated to the temperature of the bath, and a negligible invasiveness. Here, we analyze how quantum features influence the dynamical speed of single- and two-qubit nonequilibrium thermometers interacting with a bosonic thermal bath. Our investigations exploit Riemannian geometric tools to show that the Riemannian speed of the nonequilibrium thermometer is only indirectly influenced by its quantum features, thus highlighting how the quantum fingerprint seems to be concealed by the classical aspects of thermalization dynamics.

Journal/Review: PHYSICAL REVIEW A

Volume: 99 (6)      Pages from: 062114  to: 062114

More Information: The authors would like to thank M. M. Marchese, M. Paternostro, A. De Pasquale, and V. Cavina for constructive criticisms and review of our manuscript, and M. Bina, V. Cimini, and E. Roccia for useful discussions. L. M. gratefully acknowledges support by the H2020 Collaborative Project TEQ (Grant Agreement 766900), and the Angelo Della Riccia Foundation (R.D. 19.7.41. n.979, Florence).
KeyWords: Dissipative dynamics; nonequilibrium; thermodynamics; quantum channels; quantum entanglement; quantum thermodynamics
DOI: 10.1103/PhysRevA.99.062114

Citations: 13
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