Spontaneous magnetic ordering in a ferromagnetic spinor dipolar Bose-Einstein condensate

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.043627· OSTI ID:21456989

Kawaguchi, Yuki ^[1]; Saito, Hiroki ^[2]; Kudo, Kazue ^[3]; Ueda, Masahito ^[1]

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1. Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)
2. Department of Engineering Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182-8585 (Japan)
3. Ochadai Academic Production, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo 112-8610 (Japan)

We study the spin dynamics of a spin-1 ferromagnetic Bose-Einstein condensate with magnetic dipole-dipole interaction (MDDI) based on the Gross-Pitaevskii and Bogoliubov theories. We find that various magnetic structures such as checkerboards and stripes emerge in the course of the dynamics due to the combined effects of spin-exchange interaction, MDDI, quadratic Zeeman and finite-size effects, and nonstationary initial conditions. However, the short-range magnetic order observed by the Berkeley group [Phys. Rev. Lett. 100, 170403 (2008)] is not fully reproduced in our calculations; the periodicity of the order differs by a factor of 3 and the checkerboard pattern eventually dissolves in the course of time. Possible reasons for the discrepancy are discussed.

• OSTI ID: 21456989
• Journal Information: Physical Review. A, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevA.82.043627; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
EXCHANGE INTERACTIONS
FERROMAGNETISM
MAGNETIC DIPOLES
MAGNETIZATION
PERIODICITY
SPIN
SPIN EXCHANGE
WAVE EQUATIONS
ZEEMAN EFFECT
ANGULAR MOMENTUM
DIFFERENTIAL EQUATIONS
DIPOLES
EQUATIONS
INTERACTIONS
MAGNETISM
MULTIPOLES
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE PROPERTIES
VARIATIONS