Holger Bech Nielsen
Niels Bohr Institute, Denmark
Title: Gab-less semiconductor model for relativistic particles
Biography
Biography: Holger Bech Nielsen
Abstract
It is an old idea of ours (H. B. “Nielsen Dual Models'' section 6 “Catastrophe Theory Program'' Scottish University Summer school 1976?) that a most general material with only translation symmetry, but otherwise no symmetries should generically (in general) have some small regions in quasi momentum space, where you ''see" an approximate Weyl equation behavior. The Weyl equation is the relativistic equation for a (left handed) neutrino. This remark means that one could imagine, that there were behind the Standard Model of High energy physics, a very general crystal model with very little symmetry. Even for the Yang Mill or electrodynamics types fields a similar philosophy is possible. There are though some problems with this solid-state type of model beyond the Standard model, for which we thought have some remedy by means of homolumo gap effects. Now a days, the kind of material on which we speculated is being found and very high conductivity achieved for them.