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9 papers · 2 filters
On the stability of AdS black strings
Y. Brihaye, T. Delsate, E. Radu
We explore via linearized perturbation theory the Gregory-Laflamme instability of the black string solutions of Einstein's equations with negative cosmological constant recently di…
Bosonized supersymmetry from the Majorana-Dirac-Staunton theory and massive higher-spin fields
Peter A. Horvathy, Mikhail S. Plyushchay, Mauricio Valenzuela
We propose a (3+1)D linear set of covariant vector equations, which unify the spin 0 ``new Dirac equation'' with its spin 1/2 counterpart, proposed by Staunton. Our equations descr…
Noncompact sigma-models: Large N expansion and thermodynamic limit
A. Duncan, M. Niedermaier, P. Weisz
Noncompact SO(1,N) sigma-models are studied in terms of their large N expansion in a lattice formulation in dimensions d \geq 2. Explicit results for the spin and current two-point…
Analytical approximation schemes for solving exact renormalization group equations in the local potential approximation
C. Bervillier, B. Boisseau, H. Giacomini
The relation between the Wilson-Polchinski and the Litim optimized ERGEs in the local potential approximation is studied with high accuracy using two different analytical approache…
Perturbative and nonperturbative correspondences between compact and non-compact sigma-models
Max Niedermaier, Erhard Seiler, Peter Weisz
Compact (ferro- and antiferromagnetic) sigma-models and noncompact (hyperbolic) sigma-models are compared in a lattice formulation in dimensions . While the ferro- and an…
Beyond the semi-classical description of black hole evaporation
Renaud Parentani
In the semi-classical treatment, i.e. in a classical black hole geometry, Hawking quanta emerge from trans-Planckian configurations because of scale invariance. There is indeed no…