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Q: Fachverband Quantenoptik und Photonik

Q 39: Quanteninformation: Konzepte V

Q 39.1: Vortrag

Mittwoch, 4. März 2009, 16:30–16:45, VMP 6 HS-D

Evolution of entanglement entropy in disordered quantum spin chains after a local quench — •Zoltán Zimborás and Heiko Rieger — Institut für Theoretische Physik, Universität des Saarlandes, Saarbrücken, Germany

It is by now rather well-known how the entanglement entropy of a segment of spins in a homogeneous chain evolves after a global or local quench,i.e., after an instantaneous (global or local) change of parameters in the Hamiltonian. In this talk we report on results about the evolution of entanglement entropy in disordered spin chains after a local quench. We will present both analytical and numerical results, which show that there is a noticable difference between the homogeneous and disordered cases.