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DY: Fachverband Dynamik und Statistische Physik

DY 31: Quantum dynamics, decoherence and quantum information

DY 31.5: Talk

Friday, February 29, 2008, 11:15–11:30, MA 004

Entanglement evolution after connecting quantum chains — •Viktor Eisler¹, Ingo Peschel¹, Dragi Karevski², and Thierry Platini² — ¹Freie Universität Berlin — ²Universite Henri Poincare, Nancy

We consider quantum chains which are initially separated and in their ground states. After connecting them the quantum state evolves and the entanglement increases. It is found that the entanglement entropy displays a typical behaviour which is common for the different geometries considered. It is characterized by a rapid rise to values larger than in equilibrium followed by a slow relaxation. For critical systems the lattice results are in a very good agreement with predictions of conformal field theory.