6533b7dbfe1ef96bd1270ae5
RESEARCH PRODUCT
Waveguide-QED-based measurement of a reservoir spectral density
Francesco Ciccarellosubject
PhysicsQuantum PhysicsPhotonCondensed Matter - Mesoscale and Nanoscale PhysicsTime evolutionSpectral densityFOS: Physical sciencesSpectral lineWaveguide-QED-based measurement of a reservoir spectral densityAtomic and Molecular Physics and OpticsComputational physicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)Reflection (physics)TransmittanceRotating wave approximationWaveguide (acoustics)Atomic physicsQuantum Physics (quant-ph)description
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-01 |