New PVLAS results and limits on magnetically induced optical rotation and ellipticity in vacuum
New PVLAS results and limits on magnetically induced optical rotation and ellipticity in vacuum
In 2006 the PVLAS collaboration reported the observation of an optical rotation generated in vacuum by a magnetic field. To further check against possible instrumental artifacts, several upgrades to the PVLAS apparatus have been made during the past year. Two data taking runs, at the wavelength of 1064 nm, have …