A Condition for Weak Disorder for Directed Polymers in Random Environment
Matthias Birkner, Weierstrass Institute for Applied Analysis and Stochastics, Germany
Abstract
We give a sufficient criterion for the
weak disorder regime of directed polymers
in random environment, which extends a well-known
second moment criterion. We use a stochastic
representation of the size-biased law of the
partition function.
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