Fractional resonances in the atom-optical delta-kicked accelerator

Abstract

We consider resonant dynamics in a dilute atomic gas falling under gravity through a periodically pulsed standing-wave laser field. Our numerical calculations are based on a Monte Carlo method for an incoherent mixture of noninteracting plane waves, and show that quantum resonances are highly sensitive to the relative acceleration between the atomic gas and the pulsed optical standing wave. For particular values of the atomic acceleration, we observe fractional resonances. We investigate the effect of the initial atomic momentum width on the fractional resonances, and quantify the sensitivity of fractional resonances to thermal effects.

18 pages, 8 figures

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Cited by in corpus (5)

• Quantum resonances in an atom-optical delta-kicked harmonic oscillator
• Demonstration of perfect coherence preservation for matter-waves perturbed by a delta-kicked rotor
• Quantum resonant effects in the delta-kicked rotor revisited
• An $\epsilon$-pseudoclassical model for quantum resonances in a cold dilute atomic gas periodically driven by finite-duration standing-wave laser pulses
• Lattice-depth measurement using multi-pulse atom diffraction in and beyond the weakly diffracting limit