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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We study a mesoscopic ring with an in-line quantum dot threaded by anAharonov-Bohm flux. Zero-point fluctuations of the electromagnetic environmentcapacitively coupled to the ring, with $\omega^s$ spectral density, cansuppress tunneling through the dot, resulting in a quantum phase transitionfrom an unpolarized to a polarized phase. We show that robust signatures ofsuch a transition can be found in the response of the persistent current in thering to the external flux as well as to the bias between the dot and the arm.Particular attention is paid to the experimentally relevant cases of ohmic($s=1$) and subohmic ($s=1/2$) noise.Comment: 4 pages, 4 figures, realistic parameters estimated, reference update

Signatures of a Noise-Induced Quantum Phase Transition in a Mesoscopic Metal Ring