Matrix generalizations of some dynamic field theories

Details Matrix generalizations of some dynamic field theories Matrix generalizations of some dynamic field theories

1995-07-25

arxiv.org/abs/cond-mat/9507112v1

Nucl.Phys. B464 (1996) 449-462

Physics

Condensed Matter

9 pages, Hard copy figures available from: mason@itp.ucsb.edu

Scientific paper

10.1016/0550-3213(95)00660-5

We introduce matrix generalizations of the Navier--Stokes (NS) equation for fluid flow, and the Kardar--Parisi--Zhang (KPZ) equation for interface growth. The underlying field, velocity for the NS equation, or the height in the case of KPZ, is promoted to a matrix that transforms as the adjoint representation of $SU(N)$. Perturbative expansions simplify in the $N\to\infty$ limit, dominated by planar graphs. We provide the results of a one--loop analysis, but have not succeeded in finding the full solution of the theory in this limit.

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