Abstract
We demonstrate a novel dual-beam atom laser formed by outcoupling oppositely polarized components of an all-optical F = 1 spinor Bose-Einstein condensate whose Zeeman sublevel populations have been coherently evolved through spin dynamics. The condensate is formed through all-optical means using a single-beam running-wave dipole trap. We create a condensate in the magnetic field-insensitive m(F) = 0 state, and drive coherent spin-mixing evolution through adiabatic compression of the initially weak trap. Such dual beams, number-correlated through the angular momentum-conserving reaction 2m(0) ?m(+1) +m(-1), have been proposed as tools to explore entanglement and squeezing in Bose-Einstein condensates, and have potential use in precision phase measurements.
Highlights
We demonstrate a novel dual-beam atom laser formed by outcoupling oppositely polarized components of an F = 1 spinor Bose-Einstein condensate whose Zeeman sublevel populations have been coherently evolved through spin dynamics
Since the creation of the first spinor Bose-Einstein condensate (BEC) in 1998[1], a considerable body of work has emerged focusing on the properties and dynamics of such condensates, in which the spin degree of freedom has been liberated and the order parameter is vectorial
Spin mixing has been used to drive the creation of multicomponent condensates at constant temperature[11], the spatial magnetization profile of an F = 1 spinor BEC has been observed[12], and the clock transition has been explored[13]
Summary
The spinor condensate has stimulated theoretical proposals regarding schemes to create squeezed and entangled beams of atoms via coherent spin mixing[20, 21]. In this article we present observations with an experimental scheme aimed at exploring these ideas: the generation of dual atom laser beams with an inherent number correlation between them due to their spin-mixing origin.
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