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Acceleration of cold Rb atoms by frequency modulated light pulses

Jozsef S. Bakos, Gagik P. Djotyan, P.N. Ignácz +5 more

The European Physical Journal DMay 3, 200710 citations

Laser Cooling and Trapping of Rb Atoms

S. Chakraborty, A. Banerjee, Ayan Ray +4 more

Dec 1, 20060 citations

Effect of a magnetic field gradient and gravitational acceleration on a time-domain grating-echo interferometer

M. Weel, I. Y. Chan, Scott Beattie +3 more

We have observed the effects of magnetic field gradients and gravitational acceleration on grating echoes in a time-domain single state atom interferometer that uses laser cooled Rb atoms. These observations are compared to theoretical predictions based on a simplified model. The oscillatory dependence of the echo amplitude due to the magnetic field gradient is in agreement with the predicted quadratic scaling as a function of the time between excitation pulses. We also observe a linear dependence of this oscillation frequency as a function of the magnetic field gradient which is predicted by theory. In the presence of gravity, the calculations predict a quadratic dependence for the echo phase on the time between excitation pulses as well as a change in the shape of the echo envelope. We have observed both of these effects in the experiment, and we find that the change in shape is qualitatively consistent with our prediction. It is necessary to understand these effects in order to carry out high precision studies of the atomic fine-structure constant and gravitational acceleration using this interferometric technique. We also present an improved measurement of gravitational acceleration using this technique that is precise to $\ensuremath{\sim}15\phantom{\rule{0.3em}{0ex}}\mathrm{ppm}$ by exploiting the quadratic phase dependence.We have observed the effects of magnetic field gradients and gravitational acceleration on grating echoes in a time-domain single state atom interferometer that uses laser cooled Rb atoms. These observations are compared to theoretical predictions based on a simplified model. The oscillatory dependence of the echo amplitude due to the magnetic field gradient is in agreement with the predicted quadratic scaling as a function of the time between excitation pulses. We also observe a linear dependence of this oscillation frequency as a function of the magnetic field gradient which is predicted by theory. In the presence of gravity, the calculations predict a quadratic dependence for the echo phase on the time between excitation pulses as well as a change in the shape of the echo envelope. We have observed both of these effects in the experiment, and we find that the change in shape is qualitatively consistent with our prediction. It is necessary to understand these effects in order to carry out high precision studies of the atomic fine-structure constant and gravitational acceleration using this interferometric technique. We also present an improved measurement of gravitational acceleration using this technique that is precise to $\ensuremath{\sim}15\phantom{\rule{0.3em}{0ex}}\mathrm{ppm}$ by exploiting the quadratic phase dependence.

Physical Review AJun 28, 200619 citations

Double resonance spectroscopy of laser-cooled Rb atoms

Alastair G. Sinclair, Barry D. McDonald, Erling Riis +1 more

Optics CommunicationsMar 1, 199427 citations

Quantum Accelerator Modes Near Higher-Order Resonances

Italo Guarneri, Laura Rebuzzini

Quantum accelerator modes have been experimentally observed, and theoretically explained, in the dynamics of kicked cold atoms in the presence of gravity, when the kicking period is close to a half-integer multiple of the Talbot time. We generalize the theory to the case when the kicking period is sufficiently close to any rational multiple of the Talbot time, and thus predict new rich families of experimentally observable quantum accelerator modes.

arXiv:0805.2040Physical Review LettersJun 13, 200811 citations

Ultracold collisions between Rb atoms and a Sr + ion

Tomáš Šikorský, Ziv Meir, Ruti Ben-shlomi +2 more

Bulletin of the American Physical SocietyJun 11, 20150 citations

Observation of quantum accelerator modes in Rb atoms

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