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Heinze, Jannes [VerfasserIn]; Deuretzbacher, Frank [VerfasserIn]; Pfannkuche, Daniela [VerfasserIn]

Influence of the particle number on the spin dynamics of ultracold atoms - [published Version]

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  • Medientyp: Sonstige Veröffentlichung; E-Artikel
  • Titel: Influence of the particle number on the spin dynamics of ultracold atoms
  • Beteiligte: Heinze, Jannes [VerfasserIn]; Deuretzbacher, Frank [VerfasserIn]; Pfannkuche, Daniela [VerfasserIn]
  • Erschienen: College Park, MD : American Physical Society, 2010
  • Erschienen in: Physical Review A 82 (2010), Nr. 2
  • Ausgabe: published Version
  • Sprache: Englisch
  • DOI: https://doi.org/10.15488/1894; https://doi.org/10.1103/PhysRevA.82.023617
  • Schlagwörter: Electromagnetic field effects ; Ultra-cold ; Spin-dependent interactions ; Zeeman energies ; Steam condensers ; Quantum spin dynamics ; Mode approximations ; Many-body ; Collisional energies ; Dynamics ; Ultracold atoms ; Particle numbers ; Mean-field ; Spin dynamics ; Spin state ; Thermodynamic limits ; Quantum correction ; Mean field dynamics ; Atoms ; Statistical mechanics ; Optical lattices ; Magnetic fields ; Bose-Einstein condensates
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  • Anmerkungen: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Beschreibung: We study the dependency of the quantum spin dynamics on the particle number in a system of ultracold spin-1 atoms within the single-spatial-mode approximation. We find, for all strengths of the spin-dependent interaction, convergence toward the mean-field dynamics in the thermodynamic limit. The convergence is, however, particularly slow when the spin-changing collisional energy and the quadratic Zeeman energy are equal; that is, deviations between quantum and mean-field spin dynamics may be extremely large under these conditions. Our estimates show that quantum corrections to the mean-field dynamics may play a relevant role in experiments with spinor Bose-Einstein condensates. This is especially the case in the regime of few atoms, which may be accessible in optical lattices. Here, spin dynamics is modulated by a beat note at large magnetic fields due to the significant influence of correlated many-body spin states. © 2010 The American Physical Society.
  • Zugangsstatus: Freier Zugang