Waveguide-QED-based measurement of a reservoir spectral density
Quantum Physics
2015-06-24 v3 Mesoscale and Nanoscale Physics
Abstract
The spectral density (SD) function has a central role in the study of open quantum systems (OQSs). We discover a method allowing for a "static" measurement of the SD - i.e., it requires neither the OQS to be initially excited nor its time evolution tracked in time - which is not limited to the weak-coupling regime. This is achieved through one-dimensional photon scattering for a zero-temperature reservoir coupled to the OQS via the rotating wave approximation. We find that the SD profile is a universal simple function of the photon's reflectance and transmittance. As such, it can be straightforwardly inferred from photon's reflection and transmission spectra.
Keywords
Cite
@article{arxiv.1407.2182,
title = {Waveguide-QED-based measurement of a reservoir spectral density},
author = {Francesco Ciccarello},
journal= {arXiv preprint arXiv:1407.2182},
year = {2015}
}
Comments
6 pages, 1 figure