Ultracold Hydrogen

David Landhuis, W. Joffrain, Lia Matos +6 more

Daniel Kleppner

Summary form only given. The hydrogen atom played an illustrious role in the development of quantum mechanics and quantum electrodynamics. Hydrogen spectroscopy relentlessly advanced the frontiers of metrology and ultraprecise measurements. Hydrogen also helped launch the search for Bose-Einstein condensation in an atomic gas. Today, these paths are converging to a new focus: the physics of ultracold hydrogen.

Jesús Pérez‐Ríos

Yu. N. Pokotilovskiǐ

Small cooling and heating of ultracold neutrons during long storage in traps have been observed in recent experiments. It is shown that quasielastic neutron scattering due to the diffusive motion of hydrogen at the surface of adsorbed hydrogenous contaminants on the surface may be a possible cause of the spreading of the energy of ultracold neutrons during long storage in traps.

Ian C Lane

A scheme to produce ultracold hydrogen or deuterium atoms via photo-fragmentation, even allowing direct formation of a quantum gas