Not every day does “time” get into misbehavior, but in a new experiment, photons passing through a fog of ultracold rubidium-85 atoms were shown to spend a negative duration in an excited atomic state ...

A team of researchers has successfully demonstrated nonlinear Compton scattering (NCS) between an ultra-relativistic electron beam and an ultrahigh intensity laser pulse using the 4-Petawatt laser.

Schematics of the all-optical nonlinear Compton scattering experiment showing laser-driven electron acceleration, electron-laser collision, and Compton scattering to produce gamma rays. In a ...

Researchers find that a photon can spend a negative amount of time in an excited atomic state while passing through a cloud ...

Deeply Virtual Compton Scattering (DVCS) is a key exclusive process in which a highly virtual photon, emitted by an incoming electron, probes a nucleon resulting in the emission of a high‐energy real ...

A team of scientists claim they’ve uncovered a thin ring of light called a photon ring around the first black hole to have its picture taken, the supermassive black hole in the galaxy M87. But ...