Nonequilibrium quantum probing through linear response

S. Blair*, G. Zicari*, A. Belenchia, A. Ferraro, M. Paternostro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Downloads (Pure)

Abstract

The formalism of linear response theory can be extended to encompass physical situations where an open quantum system evolves toward a nonequilibrium steady state. Here, we use the framework put forward by Konopik and Lutz [Phys. Rev. Res. 1, 033156 (2019)] to go beyond unitary perturbations of the dynamics. Considering an open system comprised of two coupled quantum harmonic oscillators, we study the system's response to unitary perturbations, affecting the Hamiltonian dynamics, as well as nonunitary perturbations, affecting the properties of the environment, e.g., its temperature and squeezing. We show that linear response, combined with a quantum probing approach, can effectively provide valuable quantitative information about the perturbation and characteristics of the environment, even in cases of nonunitary dynamics.
Original languageEnglish
Article number013152
Number of pages13
JournalPhysical Review Research
Volume6
Issue number1
DOIs
Publication statusPublished - 09 Feb 2024

Fingerprint

Dive into the research topics of 'Nonequilibrium quantum probing through linear response'. Together they form a unique fingerprint.

Cite this