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 present optimized implementations of the weak-coupling continuous-timeMonte Carlo method defined for nonequilibrium problems on the Keldysh contour.We describe and compare two methods of preparing the system before beginningthe real-time calculation: the "interaction quench" and the "voltage quench",which are found to be suitable for large and small voltage biasses,respectively. We also discuss technical optimizations which increase theefficiency of the real-time measurements. The methods allow the accuratesimulation of transport through quantum dots over wider interaction ranges andlonger times than have heretofore been possible. The current-voltagecharacteristics of the particle-hole symmetric Anderson impurity model ispresented for interactions U up to 10 times the intrinsic level width Gamma. Wecompare the Monte Carlo results to fourth order perturbation theory, findingthat perturbation theory begins to fail at U/Gamma>4. Within the parameterrange studied we find no evidence for a splitting of the Kondo resonance due tothe applied voltage. The interplay of voltage and temperature and the Coulombblockade conductance regime are studied.

physical review. b, condensed matter and materials physics

Weak-coupling quantum Monte Carlo calculations on the Keldysh contour:  theory and application to the current-voltage characteristics of the Anderson  model