Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 18: Transport: Quantum Coherence and Quantum Information Systems 2 (jointly with TT, MA)

HL 18.5: Talk

Monday, March 26, 2012, 16:00–16:15, BH 243

Impurity entanglement via electron scattering in a magnetic field — Raoul Dillenschneider, •Alexandros Metavitsiadis, and Sebastian Eggert — Physics Department and Research Center OPTIMAS, Technical University of Kaiserslautern, Kaiserslautern, Germany

A possible mechanism to entangle two non-interacting magnetic moments is via successive electron scattering. Of particular interest is the case when the magnetic moments are considered as embedded impurities in a one dimensional lattice. The amount of entanglement can be modified by appropriately choosing the initial state of the system. Furthermore, the presence of a magnetic field may play a crucial role to the resulting entanglement. In this work, we present analytical as well as numerical results for the time dependence of the entanglement of magnetic moments, as manifested in the concurrence, especially stressing the role of external fields.