Directed motion for delta-kicked atoms with broken symmetries: comparison between theory and experiment |
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| Authors: | Jones P H Goonasekera M Meacher D R Jonckheere T Monteiro T S |
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| Affiliation: | Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom. |
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| Abstract: | 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 an alternating linear potential. We exploit this, and a technique involving a moving optical potential, to create an asymmetry in the momentum diffusion that is due to the classical chaotic diffusion. This represents a realization of a type of Hamiltonian quantum ratchet. |
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