Hélicité (physique des particules)

Chiral magnetohydrodynamics with zero total chirality

We study the evolution of magnetic fields coupled with chiral fermion asymmetry in the framework of chiral magnetohydrodynamics with zero initial total chirality. The initial magnetic field has a turbulent spectrum peaking at a certain characteristic scale ...

American Physical Society2023

Chiral gravitational waves from chiral fermions

Eray Sabancilar

We report on a new mechanism that leads to the generation of primordial chiral gravitational waves, and hence, the violation of the parity symmetry in the Universe. We show that nonperturbative production of fermions with a definite helicity is accompanied ...

American Physical Society2017

Electrical detection of spin hyperpolarization in InP

Jean-Philippe Ansermet, Christian Caspers

The electrical detection of surface spin polarization in Indium Phosphide (InP) is demonstrated. Using a planar four-terminal architecture on top of semi-insulating Fe: InP (001) wafers, optical orientation is separated from electrical detection. Spin filt ...

Amer Inst Physics2014

Higgs-Dilaton cosmology: Are there extra relativistic species?

Mikhail Chapochnikov, Javier Rubio

Recent analyses of cosmological data suggest the presence of an extra relativistic component beyond the Standard Model content. The Higgs-Dilaton cosmological model predicts the existence of a massless particle - the dilaton - associated with the spontaneo ...

Elsevier Science Bv2012