How many weeks' holiday a year are there? http://opendataricostruzione.gssi.it/blog/index.php/engine-2-diet-foods-9558.pdf engine 2 diet recipes soup  The ability to switch an optical gate with a single photon opens the possibility of arrays of optical circuits, all of which are in superposition. "If the gate photon is there, the light gets reflected; if the gate photon is not there, the light gets transmitted," Vuleti? explains. "So if you were to put in a superposition state of the photon being there and not being there, then you would end up with a macroscopic superposition state of the light being transmitted and reflected."