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 show that the classical (mean-field) description of far from equilibriumsuperconductivity is exact in the thermodynamic limit for local observables butbreaks down for global quantities, such as the entanglement entropy orLoschmidt echo. We do this by solving for and comparing exact quantum and exactclassical long-time dynamics of a BCS superconductor with interaction strengthinversely proportional to time and evaluating local observables explicitly.Mean field is exact for both normal and anomalous averages (superconductingorder) in the thermodynamic limit. However, for anomalous expectation values,this limit does not commute with adiabatic and strong coupling limits and, as aconsequence, their quantum fluctuations can be unusually strong. The long-timesteady state of the system is a gapless superconductor whose superfluidproperties are only accessible through energy resolved measurements. This stateis nonthermal but conforms to an emergent generalized Gibbs ensemble. Our studyclarifies the nature of symmetry-broken many-body states in and out ofequilibrium and fills a crucial gap in the theory of time-dependent quantumintegrability.

Nonlocality as the source of purely quantum dynamics of BCS superconductors