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Q: Fachverband Quantenoptik und Photonik

Q 54: Poster 3

Q 54.76: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II

Dynamics of two spins coupled to spin chain environment — •Pierre Wendenbaum^1,2, Bruno Taketani², Endre Kajari², Giovanna Morigi², and Dragi Karevski¹ — ¹Institut Jean Lamour, dpt P2M, Nancy Université-CNRS, France — ²Theoretische Physik, Universiät des Saarlandes, Saarbrücken, Germany

We study the dynamics of two spin-1/2 systems, which are coupled to a Ising spin chain but do not interact directly with one another. As shown in [1], the interaction between the distant spins, mediated by the chain, may give rise to quantum correlations in the systems of interest. We investigate these scenarios by considering the Ising chain, in the thermodynamic limit, as a commom environment to which both spins are coupled. We derive the Heisenberg-Langevin equations of motion for the spins degrees of freedom and discuss their predictions for several limiting cases.
L.Campos Venuti, S.M Giampaolo, F. Illuminati and P. Zanardi, Phys. Rev. A 76, 052328 (2007).