Concept

Multivers

Publications associées (28)

Amorphous membrane blending

The von Neumann architecture was first expressed in 1945 and has largely dominated in many variants and refinements computer science for more than half a century. Alternative architectures always occupied a marginal place only, despite a growing need for n ...

EPFL2004

Graviton loops and brane observables

Riccardo Rattazzi, Roberto Contino

We discuss how to consistently perform effective Lagrangian computations in quantum gravity with branes in compact extra dimensions. A reparametrization invariant and infrared finite result is obtained in a non trivial way. It is crucial to properly accoun ...

2001

Comments on the holographic picture of the Randall-Sundrum model

Riccardo Rattazzi

We discuss some issues about the holographic interpretation of the compact Randall-Sundrum model, which is conjectured to be dual to a 4d field theory with non-linearly realized conformal symmetry. We make several checks of this conjecture. In particular, ...

2001

On the effective action of stable non-BPS branes

Claudio Scrucca

We study the world-volume effective action of stable non-BPS branes present in Type II theories compactified on K3. In particular, by exploiting the conformal description of these objects available in the orbifold limit, we argue that their world-volume ef ...

2000

Living inside a hedgehog: Higher-dimensional solutions that localize gravity

We consider spherically symmetric higher-dimensional solutions of Einstein's equations with a bulk cosmological constant and n transverse dimensions. In contrast to the case of one or two extra dimensions we find no solutions that localize gravity when n ≥ ...

2000

Fermion zero-modes on brane-worlds

Abhisek Datta

We study localization of bulk fermions on a brane with inclusion of Yang-Mills and scalar backgrounds in higher dimensions and give the conditions under which localized chiral fermions can be obtained. (C) 2000 Elsevier Science B.V. ...

2000

Quantum gravity and extra dimensions at high-energy colliders

Riccardo Rattazzi

Recently it has been pointed out that the characteristic quantum-gravity scale could be as low as the weak scale in theories with gravity propagating in higher dimensions. The observed smallness of Newton's constant is a consequence of the large compactifi ...

1999

Black hole-D-brane correspondence: An example

Claudio Scrucca

We explore the connection between D-branes and black holes in one particular case: a D3-brane compactified to four dimensions on T-6/Z(3). Using the D-brane boundary state description, we show the equivalence with a double extremal N = 2 black hole solutio ...

Springer Verlag1999

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