Coloured Polymers
We show that non-oriented coloured polymers (self--avoiding walks with different types of links) are in the same universality class of the ordinary self--avoiding walks, while the oriented coloured are not.
hep-lat↗
arXiv subjects
I. Pesando
Publications and source records attributed to I. Pesando.
The dimer partition function
We apply the Ginzburg criterion to the dimer problem and we solve the apparent contradiction of a system with mean field $α={1\over2}$, the typical value of tricritical systems, and upper critical dimension $D_{cr}=6$. We find that the system has upper critical dimension $D_{cr}=6$ , while for $D\le4$ it should undergo a first order phase transition. We comment on the latter wrong result examining the approximation we used.
hep-lat↗
Heterotic instantons and solitons in anomaly-free supergravity
We extend the classical heterotic instanton solutions to all orders in $α'$ using the equations of anomaly-free supergravity, and discuss the relation between these equations and the string theory $β$-functions.
hep-th↗