Spin evolution in ultracold quantum gases

H. Schmaljohann, M. Erhard, J. Kronjäger, M. Kottke, S. Van Staa, J. J. Arlt, K. Bongs, K. Sengstock

Research output: Contribution to journalArticlepeer-review

Abstract

We discuss the static and dynamic magnetic properties of cold quantum gas systems. In particular, we investigate and analyze the ground state properties and dynamics of F = 2 spinor Bose-Einstein condensates of 87Rb. The rich physics of these systems is governed by an interplay between mean-field-driven spin dynamics and hyperfine-changing losses in addition to interactions with atoms in the thermal cloud. We find conversion rates on the order of 10-12 cm3 s-1 for spin-changing collisions within the F = 2 manifold and spin-dependent loss rates on the order of 10-13 cm3 s-1 for hyperfine-changing collisions. Our data leads to the conclusion that the F = 2 ground state of 87Rb is polar, while we measure the F = 1 ground state to be ferromagnetic. As remarkable features in the spin dynamics we observe spinor oscillations and a delayed formation of new mF-condensate components.

Original languageEnglish
Pages (from-to)1252-1258
Number of pages7
JournalLaser Physics
Volume14
Issue number9
Publication statusPublished - Sep 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Industrial and Manufacturing Engineering

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