Off-equilibrium Langevin dynamics of the discrete nonlinear Schrödinger chain

S. Iubini, S. Lepri, R. Livi, A. Politi

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


We introduce suitable Langevin thermostats which are able to control both the temperature and the chemical potential of a one-dimensional lattice of nonlinear Schrödinger oscillators. The resulting nonequilibrium stationary states are then investigated in the limit of low temperatures and large particle densities, where the dynamics can be mapped onto that of a coupled-rotor chain with an external torque. As a result, an effective kinetic definition of temperature can be introduced and compared with the general microcanonical (global) definition.

Original languageEnglish
Article numberP08017
Pages (from-to)1-19
Number of pages19
JournalJournal of statistical mechanics-Theory and experiment
Issue number8
Publication statusPublished - 30 Aug 2013

Bibliographical note

We thank S Olla and Y Dubi for fruitful discussions.


  • transport processes/heat transfer (theory)


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