Ionization of Rydberg atoms embedded in an ultracold plasma
Abstract
We have studied the behavior of cold Rydberg atoms embedded in an ultracold plasma. We demonstrate that even deeply bound Rydberg atoms are completely ionized in such an environment, due to electron collisions. Using a fast pulse extraction of the electrons from the plasma we found that the number of excess positive charges, which is directly related to the electron temperature Te , is not strongly affected by the ionization of the Rydberg atoms. Assuming a Michie-King equilibrium distribution, in analogy with globular star cluster dynamics, we estimate Te . Without concluding on heating or cooling of the plasma by the Rydberg atoms, we discuss the range for changing the plasma temperature by adding Rydberg atoms.
- Publication:
-
Physical Review A
- Pub Date:
- January 2005
- DOI:
- 10.1103/PhysRevA.71.013416
- arXiv:
- arXiv:quant-ph/0401045
- Bibcode:
- 2005PhRvA..71a3416V
- Keywords:
-
- 32.80.Pj;
- 52.25.Dg;
- 98.10.+z;
- Optical cooling of atoms;
- trapping;
- Plasma kinetic equations;
- Stellar dynamics and kinematics;
- Quantum Physics;
- Physics - Atomic Physics;
- Physics - Plasma Physics
- E-Print:
- To be published in P.R.A