Abstract.
We prove that there exists a diffusion process whose invariant measure is the two-dimensional polymer measure ν g . The diffusion is constructed by means of the theory of Dirichlet forms on infinite-dimensional state spaces. We prove the closability 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 hold for the two-dimensional polymer measure ν g ) but requires the quasi-invariance of ν g along a basis of vectors in the classical Cameron—Martin space such that the Radon—Nikodym derivatives (have versions which) form a continuous process. We also show the Dirichlet form to be irreducible or equivalently that the diffusion process is ergodic under time translations.
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Accepted 16 April 1998
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Albeverio, S., -Z. Hu, Y., Röckner, M. et al. Stochastic Quantization of the Two-Dimensional Polymer Measure . Appl Math Optim 40, 341–354 (1999). https://doi.org/10.1007/s002459900129
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DOI: https://doi.org/10.1007/s002459900129