Signatures of quantum stability in a classically chaotic system.
We experimentally and numerically investigate the quantum accelerator mode dynamics of an atom optical realization of the quantum delta-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.
Schlunk
S
S
Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, United Kingdom.
D'Arcy
M B
MB
Gardiner
S A
SA
Cassettari
D
D
Godun
R M
RM
Summy
G S
GS