Hamburg 2009 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 39: Quanteninformation: Konzepte V
Q 39.2: Talk
Wednesday, March 4, 2009, 16:45–17:00, VMP 6 HS-D
Entanglement entropy in quantum spin chains with finite range interaction — •Zoltan Kadar1 and Zoltan Zimboras2 — 1ISI Foundation, Torino, Italy — 2Universität des Saarlandes, Saarbrücken, Germany
Translation invariant spin chains with finite range interaction are of great interest, because they both model magnetic properties of solids and their pure states are sufficiently simple to study entanglement. The von Neumann entropy of the bipartite case has been computed for a large class of models with reflection invariant spectrum and their behaviour at the critical points were analysed in the literature. We relax the symmetry property of the interaction and provide results in the general case motivated by several concrete models currently under study.