### Session D42: SPS Undergraduate Research II

2:30 PM–5:18 PM, Monday, March 13, 2006
Baltimore Convention Center Room: 345

Chair: Gary White, Society of Physics Students

Abstract ID: BAPS.2006.MAR.D42.12

### Abstract: D42.00012 : Mean-Field Study of Magnetic Resonance for Spin-1 Condensates

4:42 PM–4:54 PM

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#### Authors:

Andrew Robertson
Hong Ling
David Grochowski
(Rowan University, Glassboro NJ)

A spin-1 alkali atom has three hyperfine spin levels $\vert$f=1,m=-1,0,+1$>$. An optical dipole trap is capable of simultaneously trapping and condensing all the hyperfine states, forming the so-called spinor Bose-Einstein condensate (BEC), where the spin degrees of freedom are virtually free. The spin-1 BEC is amenable to manipulation by magnetic field. Magnetic resonance theory is developed for a spin-1 BEC subject to both a rotating transverse magnetic field and a longitudinal magnetic field. The focus of the theory is the magnetization, which will be analyzed both analytically and numerically. Magnetization is used to probe the nonlinear two-body collisions, which strongly affect the properties of the spin-1 BEC. It is shown that while collisions modulate the population dynamics, it is the quadratic Zeeman interaction that couples the population dynamics due to collisions to the magnetization.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2006.MAR.D42.12