A Faint Atomic Echo Could Help Untangle the Universe’s Expansion
A faint scattering signal from early hydrogen and helium could help future CMB experiments test atomic physics and the Hubble tension.
atomic physics
Inside a Giant Atom, Helium Collisions Reveal Quantum Rules
Inside a giant helium atom, scientists made quantum ion–atom collisions visible, revealing resonances, particle interference, and isotope effects.
The Laser’s Fading Tail Lit Up Helium’s Hidden Dark States
A helium experiment links extreme-ultraviolet sidebands to laser-dressed dark states populated when tunneling electrons are recaptured.
The Quantum Magnet That Slowed Down Between Two Ways to Relax
A 256-qubit atom array reveals an unexpected slowdown in a quantum magnet, right where familiar fast and prethermal relaxation regimes meet.
The Quantum Slush Puzzle: Why Tiny Interactions Stop Branching
A simulated Rydberg array reveals how a faint next-neighbor interaction can turn smooth quantum excitation into branching, glass-like slush.