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oai:docta.ucm.es:20.500.14352/515822024-09-03T15:26:51Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Creffield, Charles author Fishman, S. author Monteiro, T. S. author 2006-06 We examine the quantum dynamics of cold atoms subjected to pairs of closely spaced kicks from standing waves of light and find behavior quite unlike the well-studied quantum kicked rotor QKR. We show that the quantum phase space has a periodic, cellular structure arising from a unitary matrix with oscillating bandwidth. The corresponding eigenstates are exponentially localized, but scale with a fractional power L~ħ_(-0.75), in contrast to the QKR for which L~ħ_(-1). The effect of intercell (and intracell) transport is investigated by studying the spectral fluctuations with both periodic as well as “open” boundary conditions. 1539-3755 10.1103/PhysRevE.73.066202 https://hdl.handle.net/20.500.14352/51582 http://dx.doi.org/10.1103/PhysRevE.73.066202 http://journals.aps.org Theory of 2 δ-kicked quantum rotors