PhysicsSunlight could cool an atom to its coldest possible temperature Sunlight transmitted through an optical fibre could be used to help cool a single charged atom to a temperature only a few millionths of a degree above absolute zero 51¶¯Âþ
PhysicsWhy virtual particles don’t exist but do explain reality – for now So-called virtual particles aren't particles at all. Some argue that they are merely mathematical figments, and that we need to find a better way to understand particle interactions Features