title: Dissipative dynamics of an extended magnetic nanostructure: spin necklace in a metallic environment.
abstract: We study theoretically the dynamics of an "xxz" spin necklace coupled to a conduction electron sea, a model system for a nanostructure in a dissipative environment. We extract the long-time behavior via a mapping to a multichannel Coulomb gas problem followed by a scaling analysis. The strong quantum fluctuations of the necklace cause a nontrivial dependence of couplings on system size which we extract via an analysis involving the "boundary condition changing operator," and confirm via a detailed numerical evaluation of one case.
authors: Center for Materials Theory, Department of Physics & Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, USA.
authors: N
authors: N
authors: Shah
authors: A J
authors: AJ
authors: Millis