Dynamical Zeeman resonance in spin-orbit-coupled spin-1 Bose gases

• Published in: arXiv.org
• Main Authors: Fan, Jingtao, Chen, Gang, Jia, Suotang
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 28.07.2020
• Subjects: Bose-Einstein condensates; Matter & antimatter; Orbital resonances (celestial mechanics); Physics - Quantum Gases; Physics - Quantum Physics; Quantum phenomena; Resonance
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2007.14131

We predict a dynamical resonant effect, which is driven by externally applied linear and quadratic Zeeman fields, in a spin-orbit-coupled spin-1 Bose-Einstein condensate. The Bose-Einstein condensate is assumed to be initialized in some superposed state of Zeeman sublevels and subject to a sudden shift of the trapping potential. It is shown that the time-averaged center-of-mass oscillation and the spin polarizations of the Bose-Einstein condensate exhibit remarkable resonant peaks when the Zeeman fields are tuned to certain strengths. The underlying physics behind this resonance can be traced back to the out-of-phase interference of the dynamical phases carried by different spinorbit states. By analyzing the single particle spectrum, the resonant condition is summarized as a simple algebraic relation, connecting the strengths of the linear and quadratic Zeeman fields. This property is potentially applicable in quantum information and quantum precision measurement.