English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Spectral line-shapes provide a window into the local environment coupled to aquantum transition in the condensed phase. In this paper, we build upon astochastic model to account for non-stationary background processes produced bybroad-band pulsed laser stimulation. In particular, we consider thecontribution of pair-fluctuations arising from the full bosonic many-bodyHamiltonian within a mean-field approximation, treating the coupling to thesystem as a stochastic noise term. Using the It{\^o} transformation, weconsider two limiting cases for our model which lead to a connection betweenthe observed spectral fluctuations and the spectral density of the environment.In the first case, we consider a Brownian environment and show that thisproduces spectral dynamics that relax to form dressed excitonic states andrecover an Anderson-Kubo-like form for the spectral correlations. In the secondcase, we assume that the spectrum is Anderson-Kubo like, and invert todetermine the corresponding background. Using the Jensen inequality, we obtainan upper limit for the spectral density for the background. The resultspresented here provide the technical tools for applying the stochastic model toa broad range of problems.

Stochastic exciton-scattering theory of optical lineshapes: Renormalized many-body contributions