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 analyze the quantum mechanics of the friction experienced by a smallsystem as it moves non-destructively with velocity $v$ over a surface.Specifically, we model the interactions between the system and the surface witha \textit{collision model}. We show that, under weak assumptions, the magnitudeof the friction induced by this interaction decreases as $1/v$ for largevelocities. Specifically, we predict that this phenomenon occurs in the Zenoregime, where each of the system's successive couplings to subsystems of thesurface is very brief. In order to investigate the friction at low velocitiesand with velocity-dependent coupling strengths, we motivate and develop\textit{one-dimensional convex collision models}. Within these models, weobtain an analytic expression for the general friction-velocity dependence. Weare thus able to determine exactly the conditions under which the usualfriction-velocity dependency arises. Finally, we give examples that demonstratethe possibility, in principle, of anti-friction, in which case the system isaccelerated by its interaction with the surface, a phenomenon associated withactive materials and inverted level populations.

Zeno Friction and Anti-friction from Quantum Collision Models