The spin evolution of spin-3 52Cr Bose–Einstein condensate

doi:10.1088/1674-1056/20/1/010310

Abstract This paper studies theoretically the spin evolution of a Bose–Einstein condensate starting from a mixture of two or three groups of ⁵²Cr (spin-3) atoms in an optical trap. The initial state is so chosen that the condensate has total magnetization zero so that the system does not distinguish up and down. It is assumed that the system is very dilute (particle number is very small), the temperature is very low, and the frequency of the harmonic trap is large enough. In these situations, the deviation caused by the neglect of the dipole–dipole interaction and by using the single-mode approximation is reduced. A theoretical calculation beyond the mean field theory is performed and the numerical results are helpful for the evaluation of the unknown strength g₀.

Keywords: Bose–Einstein condensate spin evolution short-ranged interaction strength

Received: 16 May 2010
Revised: 27 June 2010
Accepted manuscript online:

PACS:	03.75.Mn	(Multicomponent condensates; spinor condensates)
	03.75.Kk	(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
	03.75.Nt	(Other Bose-Einstein condensation phenomena)
	05.30.Jp	(Boson systems)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10874249 and 11075223).

Cite this article:

Situ Shu-Ping(司徒树平) and He Yan-Zhang(贺彦章) The spin evolution of spin-3 ⁵²Cr Bose–Einstein condensate 2011 Chin. Phys. B 20 010310

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The spin evolution of spin-3 52Cr Bose–Einstein condensate

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The spin evolution of spin-3 ⁵²Cr Bose–Einstein condensate