2016/09/06 by Luca Mancino, Marco Sbroscia, Ilaria Gianani +2
Computer Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Optics #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Quantum optics #Qubit #quant-ph
paper · pdf · doi:10.1103/physrevlett.118.130502
published as Phys. Rev. Lett. 118, 130502 (2017) · 6 pages, 6 figures
arxiv created 2016/09/06 · openalex publication_date 2017/03/27 · arxiv updated 2017/03/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Standard thermometry employs the thermalization of a probe with the system of interest. This approach can be extended by incorporating the possibility of using the nonequilibrium states of the probe and the presence of coherence. Here, we illustrate how these concepts apply to the single-qubit thermometer introduced by Jevtic et al. [Phys. Rev. A 91, 012331 (2015)PLRAAN1050-294710.1103/PhysRevA.91.012331] by performing a simulation of the qubit-environment interaction in a linear-optical device. We discuss the role of the coherence and how this affects the usefulness of nonequilibrium conditions. The origin of the observed behavior is traced back to how the coherence affects the propensity to thermalization. We discuss this aspect by considering the availability function.