The question that remained from the previous article was: what is the "relative phase" corresponding to the two paths of a ...

Working in close collaboration, researchers from Paderborn University, the University of Basel and Ruhr University Bochum have made a breakthrough in quantum communication. In their recently published ...

Photons passing through a specially engineered wafer emerge entangled and spread among multiple output channels. Before photon pairs can serve as conveyors of quantum information, they must be ...

Physicists have developed a spectral-filtering technique that strips away unwanted extra photons from quantum light sources, tackling one of the most persistent obstacles in quantum optics. The method ...

Quantum interference in photon systems arises when indistinguishable light quanta interact in ways that cannot be explained by classical wave superposition alone. Central to this phenomenon is the ...