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27 papers · 1 filter
The Lie algebra structure on the first Hochschild cohomology group of a monomial algebra
C. Strametz
We study the Lie algebra structure of the first Hochschild cohomology group of a finite dimensional monomial algebra A, in terms of the combinatorics of its quiver, in any characte…
Higher Order Evaluation of the Critical Temperature for Interacting Homogeneous Dilute Bose Gases
Frederico F. de Souza Cruz, Marcus B. Pinto, Rudnei O. Ramos +1
We use the nonperturbative linear δexpansion method to evaluate analytically the coefficients c_1 and c_2^{\prime \prime} which appear in the expansion for the transition temperatu…
Dynamical Zero Modes and Criticality in Continuous Light Cone Quantization of Phi^{4}_{1+1}
P. Grange, S. Salmons, E. Werner
Critical behaviour of the 2D scalar field theory in the LC framework is reviewed. The notion of dynamical zero modes is introduced and shown to lead to a non trivial covariant disp…
Renormalon disappearance in Borel sum of the 1/N expansion of the Gross-Neveu model mass gap
J. -L. Kneur, D. Reynaud
The exact mass gap of the O(N) Gross-Neveu model is known, for arbitrary , from non-perturbative methods. However, a "naive" perturbative expansion of the pole mass exhibits an…
The quantum anharmonic oscillator in the Heisenberg picture and multiple scale techniques
Guy Auberson, Michel Capdequi Peyranere
Multiple scale techniques are well-known in classical mechanics to give perturbation series free from resonant terms. When applied to the quantum anharmonic oscillator, these techn…
Hints on the power corrections from current correlators in x-space
S. Narison, V. I. Zakharov
We consider an interpretation of the recent lattice data on the current-current correlators in the x-space. The data indicate rather striking difference between (axial)vector and (…