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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 11 — May. 24, 2010
  • pp: 11599–11606

Evolution of the pairs of ultracold Rydberg atoms in the repulsive potential

Linjie Zhang, Zhigang Feng, Jianming Zhao, Changyong Li, and Suotang Jia  »View Author Affiliations


Optics Express, Vol. 18, Issue 11, pp. 11599-11606 (2010)
http://dx.doi.org/10.1364/OE.18.011599


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Abstract

We present the explicit dynamics process of Rydberg cesium atoms initially experiencing a repulsive van der Waals (vdW) interaction by measuring the line width and intensity of the Rydberg ionization spectra. The signals of Rydberg atoms and free ions are recorded simultaneously within an initial 3.5 μs delay time between the excitation laser and the ramp electric field. For high-density gases, a rapid decrease of Rydberg atoms and an increase of free ions are observed, which is not found to be the case for low-density gases. The experimental results indicate that superradiance is the main cause of the redistribution of Rydberg atoms from the repulsive potential to the attractive potential for high density, which provides the initial ionization. The corresponding theoretical calculation is also given.

© 2010 OSA

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(020.5780) Atomic and molecular physics : Rydberg states
(270.6630) Quantum optics : Superradiance, superfluorescence
(300.6350) Spectroscopy : Spectroscopy, ionization

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: January 14, 2010
Revised Manuscript: March 19, 2010
Manuscript Accepted: April 27, 2010
Published: May 18, 2010

Citation
Linjie Zhang, Zhigang Feng, Jianming Zhao, Changyong Li, and Suotang Jia, "Evolution of the pairs of ultracold Rydberg atoms in the repulsive potential," Opt. Express 18, 11599-11606 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-11-11599


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