skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Influence of a dc Offset Field on Kicked Quasi-One-Dimensional Rydberg Atoms: Stabilization and Frustrated Field Ionization

Authors:
 [1];  [2];  [1];  [3];  [3];  [3];  [3]
  1. Institute for Theoretical Physics, Vienna University of Technology, Austria
  2. ORNL
  3. Rice University
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
948073
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review A; Journal Volume: 73; Journal Issue: 3
Country of Publication:
United States
Language:
English

Citation Formats

Yoshida, S., Reinhold, Carlos O, Burgdorfer, J., Zhao, W., Mestayer, J. J., Lancaster, J. C., and Dunning, F. B. Influence of a dc Offset Field on Kicked Quasi-One-Dimensional Rydberg Atoms: Stabilization and Frustrated Field Ionization. United States: N. p., 2006. Web. doi:10.1103/PhysRevA.73.033411.
Yoshida, S., Reinhold, Carlos O, Burgdorfer, J., Zhao, W., Mestayer, J. J., Lancaster, J. C., & Dunning, F. B. Influence of a dc Offset Field on Kicked Quasi-One-Dimensional Rydberg Atoms: Stabilization and Frustrated Field Ionization. United States. doi:10.1103/PhysRevA.73.033411.
Yoshida, S., Reinhold, Carlos O, Burgdorfer, J., Zhao, W., Mestayer, J. J., Lancaster, J. C., and Dunning, F. B. Wed . "Influence of a dc Offset Field on Kicked Quasi-One-Dimensional Rydberg Atoms: Stabilization and Frustrated Field Ionization". United States. doi:10.1103/PhysRevA.73.033411.
@article{osti_948073,
title = {Influence of a dc Offset Field on Kicked Quasi-One-Dimensional Rydberg Atoms: Stabilization and Frustrated Field Ionization},
author = {Yoshida, S. and Reinhold, Carlos O and Burgdorfer, J. and Zhao, W. and Mestayer, J. J. and Lancaster, J. C. and Dunning, F. B.},
abstractNote = {},
doi = {10.1103/PhysRevA.73.033411},
journal = {Physical Review A},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2006},
month = {Wed Mar 01 00:00:00 EST 2006}
}
  • The influence of a superposed offset field on the response of highly polarized (quasi-1D) very-high-n Rydberg atoms to a periodic train of unidirectional half-cycle pulses (HCPs) is investigated, both experimentally and theoretically. It is observed that the presence of an offset field strongly influences the dynamics. The electronic states become transiently stabilized and trapped near the ionization threshold when the net average field they experience is near zero irrespective of whether the HCPs, applied parallel to the atomic axis, are directed towards or away from the nucleus. The nature of this stabilization is explored using Poincare surfaces of section. Inmore » large offset fields, direct field ionization becomes possible but it is demonstrated that this can be suppressed by application of an oppositely directed HCP train. The use of such ''frustrated field ionization'' to measure the polarization of Rydberg atoms is discussed.« less
  • We demonstrate that strongly polarized quasi-one-dimensional very-high-n (potassium) Rydberg atoms can be produced by photoexcitation of selected Stark states in the presence of a weak dc field. Calculations show that, for m=0 states, significant photoexcitation occurs only in the vicinity of the Stark-shifted s, p, and d levels, and that those states located near the Stark-shifted d level have sizable polarizations. These predictions are confirmed by experiment. The degree of polarization of the product states is analyzed by studying differences in their ionization characteristics when subject to short pulsed electric fields applied parallel and antiparallel to the dc field.
  • The characteristics of quasi-one-dimensional (1D) high-n Rydberg atoms produced by photoexciting, in a weak dc field, extreme members of the n=350 Stark manifold are investigated by studying their ionization when subjected to unidirectional electric field pulses, termed half-cycle pulses (HCP's), of duration T{sub p}T{sub n} where T{sub n} is the classical electron orbital period, directed both parallel and perpendicular to the atomic axis. The observed differences in the ionization characteristics provide a measure of the anisotropy of the momentum distribution. It is shown that HCP's applied transverse to the atomic axis provide a particularly sensitive probe of the quasi-1D naturemore » of the state. The experimental data are in good agreement with the results of classical trajectory Monte Carlo simulations.« less
  • We investigate the quantum localization of the one-dimensional Rydberg atom subject to a unidirectional periodic train of impulses. For high frequencies of the train the classical system becomes chaotic and leads to fast ionization. By contrast, the quantum system is found to be remarkably stable. We identify for this system the coexistence of different localization mechanisms associated with resonant and nonresonant diffusion. We find for the suppression of nonresonant diffusion an exponential localization whose localization length can be related to the classical dynamics in terms of the ''scars'' of the unstable periodic orbits. We show that the localization length ismore » determined by the energy excursion along the periodic orbits. The suppression of resonant diffusion along the sequence of photonic peaks is found to be nonexponential due to the presence of high harmonics in the driving force. (c) 2000 The American Physical Society.« less
  • Atoms with initial principal quantum numbers 60, 65, 69, and 72 were used in the high resolution experiments. We present results for the peak field strength for 10% ionization probability, for microwave to initial Kepler orbital frequency ratios in the range 0.6 to 1.2. The data exhibit classical scaling. Resonant features near frequency ratios unity and 2/3 were observed. One-dimensional classical numerical calculations that simulated the experimental situation, including the static electric field and the microwave pulse shape, have been carried out. The classical results are in good agreement with the data except within the 2/3 resonance region.