Phys. Rev. Lett. 90, 124102 (2003) [4 pages]Experimental Observation of High-Order Quantum Accelerator ModesReceived 2 December 2002; published 27 March 2003 Using a freely falling cloud of cold cesium atoms periodically kicked by pulses from a vertical standing wave of laser light, we present the first experimental observation of high-order quantum accelerator modes. This confirms the recent prediction by Fishman, Guarneri, and Rebuzzini [ Phys. Rev. Lett. 89 084101 (2002)]. We also show how these accelerator modes can be identified with the stable regions of phase space in a classical-like chaotic system, despite their intrinsically quantum origin. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.124102
DOI:
10.1103/PhysRevLett.90.124102
PACS:
05.45.Mt, 03.65.Sq, 32.80.Lg, 42.50.Vk
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