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

We study the statistics of thermal energy transfer in the nonequilibrium(two-bath) spin-boson model. This quantum many-body impurity system serves as acanonical model for quantum energy transport. Our method makes use of theMajorana fermion representation for the spin operators, in combination with theKeldysh nonequilibrium Green's function approach. We derive an analyticalexpression for the cumulant generating function of the model in the steadystate limit, and show that it satisfies the Gallavotti-Cohen fluctuationsymmetry. We obtain analytical expressions for the heat current and its noise,valid beyond the sequential and the co-tunnelling regimes. Our results satisfythe quantum mechanical bound for heat current in interacting nanojunctions.Results are compared with other approximate theories, as well as with anon-interacting model, a fully harmonic thermal junction.

Energy current and its statistics in the nonequilibrium spin-boson model: Majorana fermion representation