title: Energy repartition for a harmonic chain with local reservoirs.
abstract: We exactly analyze the vibrational properties of a chain of harmonic oscillators in contact with local Langevin heat baths. Nonequilibrium steady-state fluctuations are found to be described by a set of mode temperatures, independent of the strengths of both the harmonic interaction and the viscous damping. Energy is equally distributed between the conjugate variables of a given mode but differently among different modes, in a manner which depends exclusively on the bath temperatures and on the boundary conditions. We outline how bath-temperature profiles can be designed to enhance or reduce fluctuations at specific frequencies in the power spectrum of the chain length.
authors.affiliation: Institut für Theoretische Physik, Universität Leipzig, Postfach 100 920, D-04009 Leipzig, Germany.
authors.forename: Gianmaria
authors.initials: G
authors.lastname: Falasco
authors.affiliation: Department of Physics and Astronomy, University of Padova, Via Marzolo 8, I-35131 Padova, Italy.|INFN, Sezione di Padova, Via Marzolo 8, I-35131 Padova, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Baiesi
authors.affiliation: Department of Physics and Astronomy, University of Padova, Via Marzolo 8, I-35131 Padova, Italy.
authors.forename: Leo
authors.initials: L
authors.lastname: Molinaro
authors.affiliation: INFN, Sezione di Padova, Via Marzolo 8, I-35131 Padova, Italy.
authors.forename: Livia
authors.initials: L
authors.lastname: Conti
authors.affiliation: Department of Physics and Astronomy, University of Padova, Via Marzolo 8, I-35131 Padova, Italy.|INFN, Sezione di Padova, Via Marzolo 8, I-35131 Padova, Italy.|Sezione CNISM Università di Padova, Via Marzolo 8, I-35131 Padova, Italy.
authors.forename: Fulvio
authors.initials: F
authors.lastname: Baldovin