Three photons stick together to create a new form of light

 作者:穆哨     |      日期:2019-03-03 07:15:00
By Leah Crane PHOTONS are sticking together like never before. The individual photons that make up a beam of light normally don’t interact, but a team of physicists has clumped three together for the first time, creating a new form of light. To make photons attract one another, Aditya Venkatramani at Harvard University and his colleagues first prepared a dense cloud of rubidium atoms at near absolute zero temperatures. Then, they shone a weak laser beam into the cloud, sending a few photons from it to interact with the atoms. When the photons came out the other side,