Experimental evidence for the role of cantori as barriers in a quantum system

Details Experimental evidence for the role of cantori as barriers in a quantum system Experimental evidence for the role of cantori as barriers in a quantum system

1999-02-08

arxiv.org/abs/quant-ph/9902025v1

Phys.Rev. E59 (1999) 2846-2852

Physics

Quantum Physics

19 pages including 9 figures, Accepted for publication in Physical Review E in March 1999

Scientific paper

10.1103/PhysRevE.59.2846

We investigate the effect of cantori on momentum diffusion in a quantum system. Ultracold caesium atoms are subjected to a specifically designed periodically pulsed standing wave. A cantorus separates two chaotic regions of the classical phase space. Diffusion through the cantorus is classically predicted. Quantum diffusion is only significant when the classical phase-space area escaping through the cantorus per period greatly exceeds Planck's constant. Experimental data and a quantum analysis confirm that the cantori act as barriers.

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