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

Deriving minimum evolution times is of paramount importance in quantummechanics. Bounds on the speed of evolution are given by the so called quantumspeed limit (QSL). In this work we use quantum optimal control methods to studythe QSL for driven many level systems which exhibit local two-levelinteractions in the form of avoided crossings (ACs). Remarkably, we find thatoptimal evolution times are proportionally smaller than those predicted by thewell-known two-level case, even when the ACs are isolated. We show that thephysical mechanism for such enhancement is due to non-trivial cooperativeeffects between the AC and other levels, which are dynamically induced by theshape of the optimized control field.

Enhancement of quantum speed limit time due to cooperative effects in multilevel systems