Berlin 2008 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 31: Quantum dynamics, decoherence and quantum information
DY 31.5: Vortrag
Freitag, 29. Februar 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.