Floquet analysis of atom-optics tunneling experiments

ua nt - p h / 02 10 02 5 v 1 3 O ct 2 00 2 Floquet Analysis of Atom Optics Tunneling Experiments

Dynamical tunneling has been observed in atom optics experiments by two groups. We show that the experimental results are extremely well described by time-periodic Hamiltonians with momentum quantized in units of the atomic recoil. The observed tunneling has a well defined period when only two Floquet states dominate the dynamics. Beat frequencies are observed when three Floquet states dominate...

Quantum and Atom Optics

Atom Optics Using Microfabricated Structures

We present a novel method for fabricating precisely positioned small openings in thin silicon nitride membranes. Several optical elements for atoms have been constructed, including amplitude diffraction gratings and zone plates, and the results of experiments using these devices are presented. A method for creating a blazed diffraction grating is discussed. PACS: 35.10.-d, 42.25.-p Atom optics ...

Coherent destruction of tunneling and dark Floquet state

We study a system of three coherently coupled states, where one state is shifted periodically against the other two. We discover that this system possesses a dark Floquet state that has zero quasi-energy and negligible population at the intermediate state. This dark Floquet state manifests itself dynamically in terms of the suppression of inter-state tunneling, a phenomenon known as coherent de...

Multiple bifurcations in atom optics

W. K. Hensinger, B. Upcroft, C. A. Holmes, N. R. Heckenberg, G. J. Milburn, and H. Rubinsztein-Dunlop Centre for Laser Science, Department of Physics, The University of Queensland, Brisbane, Queensland 4072, Australia Department of Mathematics, The University of Queensland, Brisbane, Queensland 4072, Australia Centre for Quantum Computer Technology, Department of Physics, The University of Quee...