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Q: Fachverband Quantenoptik und Photonik

Q 66: Quantum effects: Entanglement and decoherence II

Q 66.3: Talk

Friday, March 22, 2013, 14:45–15:00, A 310

Dissipative preparation of steady-state multipartite entanglement — •Cecilia Cormick, Alejandro Bermudez, Susana F. Huelga, and Martin B. Plenio — Universität Ulm, Institut für Theoretische Physik, Ulm, Germany

We propose a method to create multipartite-entangled states of spin systems by means of engineered dissipative processes. The model we consider consists of a spin chain along which excitations are allowed to hop, while the on-site energy can be shifted by the coupling to a harmonic oscillator. We show that for small chains, by damping the harmonic oscillator the system can be driven towards an entangled asymptotic state which corresponds to the ground state of an XX spin chain with transverse field. We discuss the role of non-Markovianity of the environment and propose an implementation using ions in a linear trap.