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6 papers · 1 filter
The Other Spectral Flow
Beatriz Gato-Rivera, Jose Ignacio Rosado
Recently we showed that the spectral flow acting on the N=2 twisted topological theories gives rise to a topological algebra automorphism. Here we point out that the untwisting of…
Analytic Formulations of the Density Matrix Renormalization Group
Miguel A. Martin-Delgado, German Sierra
We present two new analytic formulations of the Density Matrix Renormalization Group Method. In these formulations we combine the block renormalization group (BRG) procedure with V…
Field Theory Entropy, the -theorem and the Renormalization Group
Jose Gaite, Denjoe O'Connor
We consider entropy and relative entropy in Field theory and establish relevant monotonicity properties with respect to the couplings. The relative entropy in a field theory with a…
Real Space Renormalization Group Methods and Quantum Groups
Miguel A. Martin-Delgado, German Sierra
We apply real-space RG methods to study two quantum group invariant Hamiltonians, that of the XXZ model and the Ising model in a transverse field defined in an open chain with appr…
Spectral Flows and Twisted Topological Theories
Beatriz Gato-Rivera, Jose Ignacio Rosado
We analyze the action of the spectral flows on N=2 twisted topological theories. We show that they provide a useful mapping between the two twisted topological theories associated…
Radiation Field on Superspace
Pedro F. Gonzalez-Diaz
We study the dynamics of multiwormhole configurations within the framework of the Euclidean Polyakov approach to string theory, incorporating a modification to the Hamiltonian whic…