Investigation of dephasing rates in an interacting Rydberg gas

Details Investigation of dephasing rates in an interacting Rydberg gas Investigation of dephasing rates in an interacting Rydberg gas

2008-11-25

arxiv.org/abs/0811.4185v1

New Journal of Physics 11 (2009) 055014 (13pp)

Physics

Quantum Physics

13 pages, 5 figures

Scientific paper

10.1088/1367-2630/11/5/055014

We experimentally and theoretically investigate the dephasing rates of the coherent evolution of a resonantly driven pseudo spin emersed in a reservoir of pseudo spins. The pseudo spin is realized by optically exciting 87 Rb atoms to a Rydberg state. Hence, the upper spin states are coupled via the strong van der Waals interaction. Two different experimental techniques to measure the dephasing rates are shown: the 'rotary echo' technique known from nuclear magnetic resonance physics and electromagnetically induced transparency. The experiments are performed in a dense frozen Rydberg gas, either confined in a magnetic trap or in an optical dipole trap. Additionally, a numerical simulation is used to analyse the dephasing in the rotary echo experiments.

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