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

Power laws in physics have until now always been associated with a scaleinvariance originating from the absence of a length scale. Recently, anemergent invariance even in the presence of a length scale has been predictedby the newly-developed nonlinear-Luttinger-liquid theory for a one-dimensional(1D) quantum fluid at finite energy and momentum, at which the particle'swavelength provides the length scale. We present the first experimental exampleof this new type of power law in the spectral function of interacting electronsin a quantum wire using a transport-spectroscopy technique. The observedmomentum dependence of the power law in the high-energy region matches thetheoretical predictions, supporting not only the 1D theory of interactingparticles beyond the linear regime but also the existence of a new type ofuniversality that emerges at finite energy and momentum.

Momentum-dependent power law measured in an interacting quantum wire beyond the Luttinger limit