Time modulation of atom sources

Details Time modulation of atom sources Time modulation of atom sources

2006-11-18

arxiv.org/abs/cond-mat/0611487v2

J. Phys. B: At. Mol. Opt. Phys. 40, 975 (2007)

Physics

Condensed Matter

Other Condensed Matter

13 pages, 8+1 figures, references added, minor corrections

Scientific paper

10.1088/0953-4075/40/5/012

Sudden turn-on of a matter-wave source leads to characteristic oscillations of the probability density which are the hallmark feature of diffraction in time. The apodization of matter waves relies on the use of smooth aperture functions which suppress such oscillations. The analytical dynamics arising with different aperture functions are discussed systematically for switching-on processes, and for single and many-pulse formation procedures. The possibility and time scale of a revival of the diffraction-in-time pattern is also analysed. Similar modulations in time of the pulsed output coupling in atom-lasers are responsible for the dynamical evolution and characteristics of the beam profile. For multiple pulses, different phase schemes and regimes are described and compared. Strongly overlapping pulses lead to a saturated, constant beam profile in time and space, up to the revival phenomenon.

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