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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In the presence of boundaries, the entanglement entropy in lattice models isknown to exhibit oscillations with the (parity of the) length of the subsystem,which however decay to zero with increasing distance from the edge. We pointout in this article that, when the subsystem starts at the boundary and ends atan impurity, oscillations of the entanglement (as well as of chargefluctuations) appear which do not decay with distance, and which exhibituniversal features. We study these oscillations in detail for the case of theXX chain with one modified link (a conformal defect) or two successive modifiedlinks (a relevant defect), both numerically and analytically. We thengeneralize our analysis to the case of extended (conformal) impurities, whichwe interpret as SSH models coupled to metallic leads. In this context, theparity effects can be interpreted in terms of the existence of non-trivialtopological phases.

Parity effects and universal terms of O(1) in the entanglement near a boundary