Gauge symmetry and Slavnov-Taylor identities for randomly stirred fluids.
The path integral for randomly forced incompressible fluids is shown to have an underlying Becchi-Rouet-Stora (BRS) symmetry as a consequence of Galilean invariance. This symmetry must be respected to have a consistent generating functional, free from both an overall infinite factor and spurious relations amongst correlation functions. We present a procedure for respecting this BRS symmetry, akin to gauge fixing in quantum field theory. Relations are derived between correlation functions of this gauge-fixed, BRS symmetric theory, analogous to the Slavnov-Taylor identities of quantum field theory.
Berera
Arjun
A
School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom. ab@ph.ed.ac.uk
Hochberg
David
D