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Asymmetric diffusion in the delta-kicked rotor with broken symmetries
P. H. Jones, M. Goonasekera, H. E. Saunders-Singer +2
We report an experimental investigation of momentum diffusion in the delta-function kicked rotor where time symmetry is broken by a two-period kicking cycle and spatial symmetry by…
A chaotic 'turnstile' for atoms in periodic potentials
M. R. Isherwood, T. S. Monteiro
Using a new type of chaotic ratchet generated by pulsed standing waves of light, we propose a mechanism which would allow packets of atoms travelling through a pulsed optical latti…
Cold atoms in optical lattices :a Hamiltonian ratchet
T. S. Monteiro, P. A. Dando, N. A. C. Hutchings +1
We investigate a new type of quantum ratchet which may be realised by cold atoms in a double-well optical lattice which is pulsed with unequal periods. The classical dynamics is ch…