Hannover 2013 – scientific programme

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A: Fachverband Atomphysik

A 40: Poster: Ultra-cold plasmas and Rydberg systems (with Q)

A 40.3: Poster

Thursday, March 21, 2013, 16:00–18:30, Empore Lichthof

Equilibration heating of Rydberg atoms — •Yaroslav Lutsyshyn and Dieter Bauer — Institut für Physik, Universität Rostock, 18051 Rostock, Germany

We investigate the equilibration heating in clouds of Rydberg atoms which are interacting with a van der Waals potential. The released energy depends only on the initial and final states, allowing a simple analysis in terms of the excitation parameters and the effective interaction constant. The control of heating is useful both if one wants to increase the motion of the Rydberg atoms, for example to enhance collisional ionization, or, to the opposite, in attempts to achieve an ordered state with an equilibrated or partially equilibrated cloud. Knowing the amount of heating maps the excitation conditions directly to the equilibrium phase diagram of the vdW gas, which we reported previously [1].

[1] O. N. Osychenko, G. E. Astrakharchik, Y. Lutsyshyn, Yu. E. Lozovik, J. Boronat, Phys. Rev. A 84, 063621, (2011).