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- Istituto Nazionale di Fisica Nucleare, Sezione di TriesteIT140 papers
- Scuola Internazionale Superiore di Studi AvanzatiIT74 papers
- University of PaduaIT41 papers
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- Institute for High Energy PhysicsES30 papers
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- Joint Institute for Nuclear ResearchRU28 papers
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- University of California, DavisUS26 papers
11 papers · 1 filter
Vacuum decay by p-branes production
Lorenzo Sindoni, Stefano Ansoldi
We present a generalization to the N-dimensional case for the nucleation coefficient of a spherical p-brane, separating two (anti-)de Sitter spacetimes. We use a semiclassical appr…
Gravitational Tunnelling of Relativistic Shells
Stefano Ansoldi, Lorenzo Sindoni
Thin shells in general relativity have been used in the past as keystones to obtain realistic models of cosmological and astrophysical situations. A crucial role for these developm…
On the absence of rapidly decaying solutions for parabolic operators whose coefficients are non-Lipschitz continuous in time
D. Del Santo, M. Prizzi
We find minimal regularity conditions on the coefficients of a parabolic operator, ensuring that no nontrivial solution tends to zero faster than any exponential.
The Spectral Geometry of the Equatorial Podles Sphere
Ludwik Dabrowski, Giovanni Landi, Mario Paschke +1
We propose a slight modification of the properties of a spectral geometry a la Connes, which allows for some of the algebraic relations to be satisfied only modulo compact operator…
Continuous Limit of Discrete Sawtooth Maps and its Algebraic Framework
Fabio Benatti, Valerio Cappellini
We study the presence of a logarithmic time scale in discrete approximations of Sawtooth Maps on the 2--torus. The techniques used are suggested by quantum mechanical similarities,…
Detecting nonlinear corrosion by electrostatic measurements
Giovanni Alessandrini, Eva Sincich
We deal with an inverse problem arising in corrosion detection. We prove a stability estimate for a nonlinear term on the inaccessible portion of the boundary by electrostatic boun…