Entanglement entropy with interface defects

TL;DR

This paper investigates how interface defects in a half-filled free electron chain affect entanglement entropy, revealing a logarithmic dependence with defect-dependent constants.

Contribution

It provides a detailed analysis of entanglement entropy in the presence of interface defects, highlighting the continuous variation of constants with defect strength.

Findings

Entanglement entropy exhibits logarithmic growth.

Constants depend continuously on defect strength.

Interface defects influence entanglement properties.

Abstract

We consider a section of a half-filled chain of free electrons and its entanglement with the rest of the system in the presence of one or two interface defects. We find a logarithmic behaviour of the entanglement entropy with constants depending continuously on the defect strength.