Abstract
Interesting physical results can be obtained from sigma models by taking the number of fields N to zero. I discuss how one can make sense of this limit by using exact S matrix techniques. I review how this can be done for the case of self-avoiding polymers, and speculate on the application to the replica limit of disordered systems.
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Fendley, P. (2002). Taking N → 0 with S Matrices. In: Cappelli, A., Mussardo, G. (eds) Statistical Field Theories. NATO Science Series, vol 73. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0514-2_21
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DOI: https://doi.org/10.1007/978-94-010-0514-2_21
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