Massless Fermions Generated by Ultrashort Laser Pulses

摘要

In this paper the interaction of ultra-short laser pulses with matter is considered. Based on the thermal Klein-Gordon equation for heat transport, the condition for the existence of mass-less fermions could be expressed. This condition is V{sub}τ ＞-, where V is the potential energy and r is the relaxation time. The mass less electrons in graphene and mass-less nucleons in 2D nuclei are discussed.