Nonabelian Bosonization as a Nonholonomic Transformations from Flat to Curved Field Space

Details Nonabelian Bosonization as a Nonholonomic Transformations from Flat to Curved Field Space Nonabelian Bosonization as a Nonholonomic Transformations from Flat to Curved Field Space

1996-06-12

arxiv.org/abs/hep-th/9606065v1

Annals Phys. 253 (1997) 121-176

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

10.1006/aphy.1997.5604

There exists a simple rule by which path integrals for the motion of a point particle in a flat space can be transformed correctly into those in curved space. This rule arose from well-established methods in the theory of plastic deformations, where crystals with defects are described mathematically by applying nonholonomic coordinate transformations to ideal crystals. In the context of time-sliced path integrals, this has given rise to a {\em quantum equivalence principle\/} which determines the measure of fluctating orbits in spaces with curvature and torsion. The nonholonomic transformations are accompanied by a nontrivial Jacobian which in curved spaces produces an additional energy proportional to the curvature scalar, thereby canceling an equal term found earlier by DeWitt from a naive formulation of Feynman's time-sliced path integral in curved space. The importance of this cancelation has been documented in various systems (H-atom, particle on the surface of a sphere, spinning top). Here we point out its relevance in the process of bosonizing a nonabelian one-dimensional quantum field theory, whose fields live in a flat field space. Its bosonized version is a quantum-mechanical path integral of a point particle moving in a space with constant curvature. The additional term introduced by the Jacobian is crucial for the identity between original and bosonized theory. A useful bozonization tool is the so-called Hubbard-Stratonovich formula for which we find a nonabelian version.

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