Phys. Rev. Lett. 90, 054101 (2003) [4 pages]Signatures of Quantum Stability in a Classically Chaotic SystemReceived 20 June 2002; published 3 February 2003 We experimentally and numerically investigate the quantum accelerator mode dynamics of an atom optical realization of the quantum δ-kicked accelerator, whose classical dynamics are chaotic. Using a Ramsey-type experiment, we observe interference, demonstrating that quantum accelerator modes are formed coherently. We construct a link between the behavior of the evolution’s fidelity and the phase space structure of a recently proposed pseudoclassical map, and thus account for the observed interference visibilities. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.054101
DOI:
10.1103/PhysRevLett.90.054101
PACS:
05.45.Mt, 03.65.Sq, 32.80.Lg, 42.50.Vk
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