Gauge principle and QED

One of the major developments of twentieth century physics has been the gradual recognition that a common feature of the known fundamental interactions is their gauge structure. In this talk the early history of gauge theory is reviewed, emphasizing especially Weyl's seminal contributions of 1918 and 1929.Comment: Invited talk at PHOTON2005, 31.8-04.09, 2005, Warsaw, 19 page

Has Dark Energy really been discovered in the Lab?

We show that Dark Energy contributions can not be determined from noise measurements of Josephson junctions, as was recently suggested in a paper by C. Beck and M.C. Mackey.Comment: The paper is accepted for publication in Physics Letters B; added equation