%0 Journal Article
%A Creffield, Charles E.
%A Fishman, S.
%A Monteiro, T. S.
%T Theory of 2  δ-kicked quantum rotors
%D 2006
%@ 1539-3755
%U https://hdl.handle.net/20.500.14352/51582
%X 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.
%~