Entanglement in fermionic chains with interface defects

TY - JOUR

T1 - Entanglement in fermionic chains with interface defects

AU - Eisler, Viktor

AU - Peschel, Ingo

PY - 2010/9

Y1 - 2010/9

N2 - We study the ground-state entanglement of two halves of a critical transverse Ising chain, separated by an interface defect. From the relation to a two-dimensional Ising model with a defect line we obtain an exact expression for the continuously varying effective central charge which governs the asymptotic behaviour of the entanglement entropy. The result is relevant also for other fermionic chains.

AB - We study the ground-state entanglement of two halves of a critical transverse Ising chain, separated by an interface defect. From the relation to a two-dimensional Ising model with a defect line we obtain an exact expression for the continuously varying effective central charge which governs the asymptotic behaviour of the entanglement entropy. The result is relevant also for other fermionic chains.

U2 - 10.1002/andp.201000055

DO - 10.1002/andp.201000055

M3 - Journal article

SN - 0003-3804

VL - 522

SP - 679

EP - 690

JO - Annalen der Physik

JF - Annalen der Physik

IS - 9

ER -