title: Strongly magnetized antihydrogen and its field ionization.
abstract: Internal orbits of experimentally analyzed antihydrogen (H) atoms depend as much on an external magnetic field as on the Coulomb force. A circular "guiding center atom" model is used to understand their field ionization. This useful model, assumed in the theory of three-body H recombination so far, ignores the important coupling between internal and center-of-mass motion. A conserved pseudomomentum, effective potential, saddle point analysis, and numerical simulation show where the simple model is valid and classify the features of the general case, including "giant dipole states."
authors.affiliation: ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.
authors.forename: D
authors.initials: D
authors.lastname: Vrinceanu
authors.forename: B E
authors.initials: BE
authors.lastname: Granger
authors.forename: R
authors.initials: R
authors.lastname: Parrott
authors.forename: H R
authors.initials: HR
authors.lastname: Sadeghpour
authors.forename: L
authors.initials: L
authors.lastname: Cederbaum
authors.forename: A
authors.initials: A
authors.lastname: Mody
authors.forename: J
authors.initials: J
authors.lastname: Tan
authors.forename: G
authors.initials: G
authors.lastname: Gabrielse