Dispersion management using betatron resonances in an ultracold-atom storage ring.
Particles circulating at specific velocities in a storage ring can undergo betatron resonances at which static perturbations of the particles' orbit yield large transverse (betatron) oscillations. We have observed betatron resonances in an ultracold-atom storage ring and found these resonances to cause the near-elimination of the longitudinal dispersion of atomic beams propagating at resonant velocities. This effect can improve atom-interferometric devices. Both the resonant velocities and the resonance strengths were varied by deliberate modifications to the storage ring.
Department of Physics, University of California, Berkeley, California 94720, USA.
K W
KW
Murch
K L
KL
Moore
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S
Gupta
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DM
Stamper-Kurn