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Lagrangian Reductions and Integrable Systems in Condensed Matter

Publications associées (32)

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On the effect of resonances in composite Higgs phenomenology

Riccardo Rattazzi, Duccio Pappadopulo, Roberto Contino

We consider a generic composite Higgs model based on the coset SO(5)= SO(4) and study its phenomenology beyond the leading low-energy effective lagrangian approximation. Our basic goal is to introduce in a controllable and simple way the lowest-lying, poss ...

2011

Ground states and excitations of frustrated magnetic systems, from the classical limit to the quantum case

The first part of this thesis is devoted to classical magnetic systems. A method for an exhaustive search of states that do not break any spatial symmetry on a given lattice is presented. New Néel states on the kagome lattice are described. Their static st ...

LPTMC, Paris VI2010

Mildly sequestered supergravity models and their realization in string theory

Claudio Scrucca, Christopher John Andrey

We elaborate on the idea that five-dimensional models where sequestering is spoiled due to contact interactions induced by vector multiplets may still be mildly sequestered if a global version of the gauge symmetry associated to the latter survives in the ...

2010

Gauge boson mass generation in AdS(4)

Riccardo Rattazzi

We investigate the role of boundary conditions in gauge theories in AdS(4). The presence of the boundary can break the gauge symmetry consistently with AdS(4) isometries. We show that, as a consequence, the gauge bosons associated to the broken symmetries ...

2009

Anomalous solitons

Matthias Schmid

Solitons are stable, non-singular solutions to the classical equations of motion of non-linear field theory. Their energy is localized and finite and their shape remains unaltered during propagation. For this reason they represent particle-like states in f ...

EPFL2008

Photodissociation of Alkyl Iodides in Helium Nanodroplets II: Solvation Dynamics

Marcel Drabbels, Andreas Braun

The solvation dynamics of non-thermal species in liquid helium has been investigated by photolyzing alkyl iodide molecules, CH3I, C2H5I and CF3I, embedded in helium nanodroplets. The iodine and CH3 fragments are found to leave the droplets solvated by a fi ...

2007

Anomalous Abelian solitons

Matthias Schmid

The chiral Abelian Higgs model contains an interesting class of solitons found by Rubakov and Tavkhelidze. These objects carry non-zero fermion number NF (or Chern-Simons number NCS, what is the same because of the chiral anomaly) and are stable for suffic ...

2007

Charpy impact tests on martensitic/ferritic steels after irradiation in SINQ Target-3

Yong Dai

Charpy impact tests were performed on martensitic/ferritic (MF) steels T91, F82H, Optifer-V and Optimax-A/-C irradiated in SINQ Target-3 up to 7.5 dpa and 500 appm He in a temperature range of 120-195 degrees C. Results demonstrate that for all the four ki ...

2005

Photodissociation studies of CH3I and CF3I in fluid 4Helium nanodroplets

Andreas Braun

A novel experimental apparatus to study the dynamics of photodissociation and photoionization processes in the interior or at the surface of helium droplets by means of imaging techniques has been designed, built and characterized. This molecular beam mach ...

EPFL2004

Imaging the Translational Dynamics of CF3 in Liquid Helium Droplets

Marcel Drabbels, Andreas Braun

The translational dynamics of CF3 in liquid helium have been investigated by photodissociating CF3I dissolved in helium droplets consisting of several thousands of atoms. The velocity distribution of CF3 fragments that have escaped from the droplets has be ...

2004