Spin evolution in ultracold quantum gases

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

Spin evolution in ultracold quantum gases

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

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-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 m_F-condensate components.

Original language	English
Pages (from-to)	1252-1258
Number of pages	7
Journal	Laser Physics
Volume	14
Issue number	9
Publication status	Published - Sept 2004

ASJC Scopus subject areas

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

Cite this

@article{63286ad020844e7384c339cd8e5faf14,

title = "Spin evolution in ultracold quantum gases",

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.",

author = "H. Schmaljohann and M. Erhard and J. Kronj{\"a}ger and M. Kottke and {Van Staa}, S. and Arlt, {J. J.} and K. Bongs and K. Sengstock",

year = "2004",

month = sep,

language = "English",

volume = "14",

pages = "1252--1258",

journal = "Laser Physics",

issn = "1054-660X",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "9",

}

TY - JOUR

T1 - Spin evolution in ultracold quantum gases

AU - Schmaljohann, H.

AU - Erhard, M.

AU - Kronjäger, J.

AU - Kottke, M.

AU - Van Staa, S.

AU - Arlt, J. J.

AU - Bongs, K.

AU - Sengstock, K.

PY - 2004/9

Y1 - 2004/9

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=9744252317&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:9744252317

SN - 1054-660X

VL - 14

SP - 1252

EP - 1258

JO - Laser Physics

JF - Laser Physics

IS - 9

ER -

Spin evolution in ultracold quantum gases

Abstract

ASJC Scopus subject areas

Fingerprint

Cite this