Energy and heat fluctuations in a temperature quench
Date of Issue2014
School of Physical and Mathematical Sciences
Fluctuations of energy and heat are investigated during the relaxation following the instantaneous temperature quench of an extended system. Results are obtained analytically for the Gaussian model and for the large N model quenched below the critical temperature TC. The main finding is that fluctuations exceeding a critical threshold do condense. Though driven by a mechanism similar to that of Bose–Einstein condensation, this phenomenon is an out-of-equilibrium feature produced by the breaking of energy equipartition occurring in the transient regime. The dynamical nature of the transition is illustrated by phase diagrams extending in the time direction.
DRNTU::Science::Physics::Heat and thermodynamics
Communications in theoretical physics
© 2014 Chinese Physical Society and IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Communications in Theoretical Physics, Chinese Physical Society and IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1088/0253-6102/62/4/13].