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31 papers · 1 filter
Classical limit of a scalar quantum field theory
S. Nagy, J. Polonyi
It is well known that a minimal distance emerges in quantum field theories owing to the need to regularize the UV divergences. The macroscopical limit at large minimal distance, we…
New perspectives in Kac-Moody algebras associated to higher dimensional manifolds
Rutwig Campoamor-Stursberg, Alessio Marrani, Michel Rausch de Traubenberg
In this review, we present a general framework for the construction of Kac-Moody (KM) algebras associated to higher-dimensional manifolds. Starting from the classical case of loop…
Kac-Moody Algebras on Soft Group Manifolds
Rutwig Campoamor-Stursberg, Alessio Marrani, Michel Rausch de Traubenberg
Within the so-called group geometric approach to (super)gravity and (super)string theories, any compact Lie group manifold can be smoothly deformed into a group manifold $G…
Symmetry restoration, Tunnelling and the Null Energy Condition
Jean Alexandre, Janos Polonyi
A finite volume allows tunnelling between degenerate vacua in Quantum Field Theory, and leads to remarkable energetic features, arising from the competition of different saddle poi…
A pedagogical discussion of N = 1 four-dimensional supergravity in superspace
Robin Ducrocq, Michel Rausch de Traubenberg, Mauricio Valenzuela
A short introduction to N = 1 supergravity in four dimensions in the superspace approach is given emphasising on all steps to obtain the final Lagrangian. In particular starting fr…
Tunnelling and dynamical violation of the Null Energy Condition
Jean Alexandre, Janos Polonyi
The Null Energy Condition is considered the most fundamental of the energy conditions, on which several key results, such as the singularity theorems, are based. The Casimir effect…