Concept

Grande unification

Publications associées (236)

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Towards Real-Time Sensor-Based Path Planning in Highly Dynamic Environments

Roland Siegwart, Björn Jensen, Roland Philippsen

This paper presents work on sensor-based motion planning in initially unknown dynamic environments. Motion detection and probabilistic motion modeling are combined with a smooth navigation function to perform on-line path planning and replanning in clutter ...

2007

Femtosecond polarization relaxation in CdSe nanocrystals

Majed Chergui, Frank van Mourik, Awos Al Salman

We present ultrafast pump-probe studies on chem. prepd. CdSe nanocrystals. Upon pulsed optical excitation we find pronounced oscillations, indicating strong coupling to a LO phonon mode. From the polarization dependence of the signal addnl. information abo ...

2007

Can an odd number of fermions be created due to chiral anomaly?

Yannis Burnier

We describe a possible creation of an odd number of fractionally charged fermions in the 1+1 dimensional Abelian Higgs model. We point out that for 1+1 dimensions this process does not violate any symmetries of the theory, nor makes it mathematically incon ...

2006

The Heard-Of Model: Unifying all Benign Failures

André Schiper

Problems in fault-tolerant distributed computing have been studied in a variety of models. These models are structured around two central ideas: 1. Degree of synchrony and failure model are two independent parameters that determine a particular type of sys ...

2006

The nuMSM, dark matter and neutrino masses

An extension of the minimal standard model by three right-handed neutrinos with masses smaller than the electroweak scale (the νMSM) allows to explain simultaneously neutrino oscillations and dark matter in the universe. We show how to fix the absolute val ...

2006

Minimal gauge-Higgs unification with a flavour symmetry

Claudio Scrucca

We show that a flavour symmetry a la Froggatt-Nielsen can be naturally incorporated in models with gauge-Higgs unification, by exploiting the heavy fermions that are anyhow needed to realize realistic Yukawa couplings. The case of the minimal five-dimensio ...

2005

Anomalies as a signature of extra dimensions

Alexey Boyarsky, Oleg Ruchayskiy

The anomaly cancellation condition of the Standard Model may be unnatural in theories with extra dimensions as an anomaly of a low-energy 4-dimensional theory can be canceled by an inflow from a bulk. This inflow may give rise to an observable effect at lo ...

2005

D-type supersymmetry breaking and brane-to-brane gravity mediation

Riccardo Rattazzi, Claudio Scrucca

We revisit the issue of gravitational contributions to soft masses in five-dimensional sequestered models. We point out that, unlike for the case of F-type supersymmetry breaking, for D-type breaking these effects generically give positive soft masses squa ...

2005

One-loop fermionic corrections to the instanton transition in two dimensional chiral Higgs model

Yannis Burnier

The one-loop fermionic contribution to the probability of an instanton transition with fermion number violation is calculated in the chiral Abelian Higgs model in 1+1 dimensions, where the fermions have a Yukawa coupling to the scalar field. The dependence ...

2005

Tunneling-percolation origin of nonuniversality: Theory and experiments

Peter Ryser, Claudio Grimaldi, Thomas Maeder, Sonia Vionnet Menot

A vast class of disordered conducting-insulating compounds close to the percolation threshold is characterized by nonuniversal values of transport critical exponent t, in disagreement with the standard theory of percolation which predicts t ...

2005