title: Is the angular momentum of an electron conserved in a uniform magnetic field?
abstract: We show that an electron moving in a uniform magnetic field possesses a time-varying "diamagnetic" angular momentum. Surprisingly this means that the kinetic angular momentum of the electron may vary with time, despite the rotational symmetry of the system. This apparent violation of angular momentum conservation is resolved by including the angular momentum of the surrounding fields.
authors.affiliation: SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
authors.forename: Colin R
authors.initials: CR
authors.lastname: Greenshields
authors.affiliation: SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
authors.forename: Robert L
authors.initials: RL
authors.lastname: Stamps
authors.affiliation: SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
authors.forename: Sonja
authors.initials: S
authors.lastname: Franke-Arnold
authors.affiliation: SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Barnett