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13 papers · 1 filter
Subdiffusive and superdiffusive quantum transport and generalized duality
M. Sassetti, H. Schomerus, U. Weiss
As a generic model for transport of interacting fermions through a barrier or interstitials in a lattice, quantum Brownian motion in a periodic potential is studied. There is a dua…
All order I.R. finite expansion for short distance behavior of massless theories perturbed by a relevant operator
R. Guida, N. Magnoli
We consider here renormalizable theories without relevant couplings and present an I.R. consistent technique to study corrections to short distance behavior (Wilson O.P.E. coeffici…
Infrared Regularization of Yang-Mills Theories
Alberto Blasi, Nicola Maggiore
We introduce an infrared regulator in Yang--Mills theories under the form of a mass term for the nonabelian fields. We show that the resulting action, built in a covariant linear g…
Gribov horizon, contact terms and Čech- De Rham cohomology in 2D topological gravity
C. M. Becchi, C. Imbimbo
We point out that averages of equivariant observables of 2D topological gravity are not globally defined forms on moduli space, when one uses the functional measure corresponding t…
Low-temperature nonequilibrium transport in a Luttinger liquid
Ulrich Weiss, Reinhold Egger, Maura Sassetti
The temperature-dependent nonlinear conductance for transport of a Luttinger liquid through a barrier is calculated in the nonperturbative regime for , where is the di…
Neutralino dark matter in supersymmetric models with non--universal scalar mass terms
V. Berezinsky, A. Bottino, J. Ellis +3
Neutralino dark matter is studied in the context of a supergravity scheme where the scalar mass terms are not constrained by universality conditions at the grand unification scale.…