Out-of-equilibrium quantum fields with conserved charge

We study the out-of-equilibrium evolution of an O(2)-invariant scalar field in which a conserved charge is stored. We apply a loop expansion of the 2-particle irreducible effective action to 3-loop order. Equations of motion are derived which conserve both total charge and total energy yet allow for the effects of scattering whereby charge and energy can transfer between modes. Working in (1+1)-dimensions we solve the equations of motion numerically for a system knocked out of equilibrium by a sudden temperature quench. We examine the initial stages of the charge and energy redistribution. This provides a basis from which we can understand the formation of Bose-Einstein condensates from first principles.Comment: 11 pages, 5 figures, replacement with improved presentatio

Co-operation in Drug Treatment Services: Views of Offenders on Court Orders in Scotland

Accessing client perspectives about cooperation in substance misuse treatment offers important information to enhance services and improve drop-out rates. This article reports upon qualitative data from a localized study of service needs of offenders in Scotland who were undertaking community-based court orders. The views of 27 men and 2 women on their current and recent treatment offers rich insights into factors influencing their cooperation in treatment. In contradiction to the voluntaristic ideology of treatment services, their voices identify the criminal justice system as offering strong support in the completion of treatment programmes