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Stochastic quantization of the three-dimensionalpolymer

We prove that there exists a diiusion process whose invariant measure is the three-dimensional polymer measure. The diiusion is constructed by means of the theory of Dirichlet forms on innnite-dimensional state spaces. We prove the closabi-lity of the appropriate pre-Dirichlet form which is of gradient type, using a general closability result by two of the authors. This result does not require an integration by parts formula (which does not even hold for the two-dimensional polymer measure) but requires the quasi-invariance of along a basis of vectors in the classical Cameron-Martin space such that the Radon-Nikodym derivatives (have versions which) form a continuous process.