Nonadiabatic Dynamics of Atoms in Nonuniform Magnetic Fields

Details Nonadiabatic Dynamics of Atoms in Nonuniform Magnetic Fields Nonadiabatic Dynamics of Atoms in Nonuniform Magnetic Fields

1997-12-04

arxiv.org/abs/physics/9712009v1

Phys. Rev. A, 56, (1997) 5004-5013

Physics

Atomic Physics

1 file, 17 pages, RevTex, 2 tables

Scientific paper

10.1103/PhysRevA.56.5004

Dynamics of neutral atoms in nonuniform magnetic fields, typical of quadrupole magnetic traps, is considered by applying an accurate method for solving nonlinear systems of differential equations. This method is more general than the adiabatic approximation and, thus, permits to check the limits of the latter and also to analyze nonadiabatic regimes of motion. An unusual nonadiabatic regime is found when atoms are confined from one side of the z-axis but are not confined from another side. The lifetime of atoms in a trap in this semi-confining regime can be sufficiently long for accomplishing experiments with a cloud of such atoms. At low temperature, the cloud is ellipsoidal being stretched in the axial direction and moving along the z-axis. The possibility of employing the semi-confining regime for studying the relative motion of one component through another, in a binary mixture of gases is discussed.

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