Nanotechnology Now - Press Release: Purdue researchers suggest novel way to generate a light source made from entangled photons: This research shows promise in establishing the measurement of entangled photons down to the attosecond, and possibly even zeptosecond nanotech-now.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nanotech-now.com Daily Mail and Mail on Sunday newspapers.