Measurement and simulation of laser-induced fluorescence from non-equilibrium ultracold neutral plasmas

Details Measurement and simulation of laser-induced fluorescence from non-equilibrium ultracold neutral plasmas Measurement and simulation of laser-induced fluorescence from non-equilibrium ultracold neutral plasmas

2009-06-25

arxiv.org/abs/0906.4724v1

Physics

Atomic Physics

Scientific paper

We report new measurements and simulations of laser-induced fluorescence in ultracold neutral plasmas. We focus on the earliest times, when the plasma equilibrium is evolving and before the plasma expands. In the simulation, the ions interact via the Yukawa potential in a small cell with wrapped boundary conditions. We solve the optical Bloch equation for each ion in the simulation as a function of time. Both the simulation and experiment show the initial Bloch vector rotation, disorder-induced heating, and coherent oscillation of the rms ion velocity. Detailed modeling of the fluorescence signal makes it possible to use fluorescence spectroscopy to probe ion dynamics in ultracold and strongly coupled plasmas.

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