RT Journal Article T1 Nonrelativistic limit in the 2+1 Dirac oscillator: a Ramsey-interferometry effect A1 Bermúdez Carballo, Alejandro A1 Martín-Delgado Alcántara, Miguel Ángel A1 Luis Aina, Alfredo AB We study the nonrelativistic limit of a paradigmatic model in relativistic quantum mechanics, the two-dimensional Dirac oscillator. Remarkably, we find a different kind of Zitterbewegung which persists in this nonrelativistic regime, and leads to an observable deformation of the particle orbit. This effect can be interpreted in terms of a Ramsey-interferometric phenomenon, allowing an insightful connection between relativistic quantum mechanics and quantum optics. Furthermore, subsequent corrections to the nonrelativistic limit, which account for the usual spin-orbit Zitterbewegung, can be neatly understood in terms of a Mach-Zehnder interferometer. PB American Physical Society SN 1050-2947 YR 2008 FD 2008-03-18 LK https://hdl.handle.net/20.500.14352/51487 UL https://hdl.handle.net/20.500.14352/51487 LA eng NO ©2008 The American Physical Society. We acknowledge financial support from the Spanish MEC project No. FIS2006-04885, the project No. CAM-UCM/910758 (A.B. and M.A.M.D.) and the UCM project No. PR1-A/07-15378 (A.L.). Additionally, we acknowledge support from a FPU MEC grant (A.B.), and the ESF Science Programme INSTANS 2005-2010 (M.A.M.D.). NO Ministerio de Educación y Ciencia (MEC), España NO Universidad Complutense de Madrid (UCM) NO Comunidad de Madrid (CAM) NO European Science Foundation (ESF) DS Docta Complutense RD 20 mar 2026