Functional renormalization group at large N for random manifolds

Details Functional renormalization group at large N for random manifolds Functional renormalization group at large N for random manifolds

2001-09-11

arxiv.org/abs/cond-mat/0109204v1

Phys. Rev. Lett. 89 (2002) 125702

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevLett.89.125702

We introduce a method, based on an exact calculation of the effective action at large N, to bridge the gap between mean field theory and renormalization in complex systems. We apply it to a d-dimensional manifold in a random potential for large embedding space dimension N. This yields a functional renormalization group equation valid for any d, which contains both the O(epsilon=4-d) results of Balents-Fisher and some of the non-trivial results of the Mezard-Parisi solution thus shedding light on both. Corrections are computed at order O(1/N). Applications to the problems of KPZ, random field and mode coupling in glasses are mentioned.

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