A Quantum Dot Uses a Natural Echo to Keep Photons Entangled
A semiconductor quantum dot times two oppositely precessing spins to preserve photon entanglement, pointing toward larger quantum-light sources.
quantum optics
A Glass Fan-Out Gives Tiny Atomic Sources a Fiber-Scale World
A glass waveguide bridges atomic-scale spacing to standard fibers, routing photons from 50 individually addressed rubidium atoms.
A Laser Tried to Make Empty Space Scatter Its X-Ray Beam
A dark-field experiment used colliding X-rays and a powerful laser to probe photon scattering in vacuum, setting a much tighter low-energy limit.
A Photonic Chip Turns a Weak Random Seed Into a Secret
A silicon photonic chip uses quantum measurements to upgrade a biased, partly exposed random seed into a longer certified secret stream.