Little big photon
Department of Physics and Research – Laboratory of Electronics – Massachusetts Institute of Technology – Cambridge, MA, USA
A photon, the constituent particle of light, carries only a tiny amount of energy. Furthermore photons do not interact with one another in vacuum, and generally only very weakly in optical media. Nonetheless, it has recently become possible for a single photon to switch on or off hundreds of other photons, or to generate entanglement between thousands of atoms.
© European Physical Society, EDP Sciences, 2015