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Abstract: We study the dynamics of a trapped spin-1 condensate in a magnetic field.First, we analyze the homogeneous system, for which the dynamics can beunderstood in terms of orbits in phase space. We analytically solve for thedynamical evolution of the populations of the various Zeeman components of thehomogeneous system. This result is then applied via a local densityapproximation to trapped quasi-1D condensates. Our analysis of the trappedsystem in a magnetic field shows that both the mean-field and Zeeman regimesare simultaneously realized, and we argue that the border between these tworegions is where spin domains and phase defects are generated. We propose amethod to experimentally tune the position of this border.



Author: Jordi Mur-Petit UCL

Source: https://arxiv.org/







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