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Title: Dephasing of Stark Wave Packets Induced by Colored Noise

Abstract

The time evolution of Stark wave packets in Rydberg atoms under the influence of colored noise is analyzed. The Stark wave packets are generated by exposing K(350p) Rydberg atoms to an electric field step. Their time evolution is monitored using a half-cycle probe pulse that is applied after a variable time delay. The noise is generated by randomly modulating the amplitude of the static field. We show that noise results in an enhanced and irreversible dephasing of Stark quantum beats, as monitored by the damping of the beat amplitude. This source of decoherence is most effective when the characteristic frequency of the noise power spectrum matches the orbital frequency of the Rydberg electron. Noise driven resonant deltan=1 transitions broaden the energy distribution thereby accelerating the dephasing.

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:
932136
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 75; Journal Issue: 1; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; STARK EFFECT; AMPLITUDES; DAMPING; ENERGY SPECTRA; WAVE PACKETS; RYDBERG STATES; NOISE; PHASE TRANSFORMATIONS

Citation Formats

Yoshida, S, Reinhold, Carlos O, Burgdorfer, J, Zhao, W, Mestayer, J J, Lancaster, J C, and Dunning, F B. Dephasing of Stark Wave Packets Induced by Colored Noise. United States: N. p., 2007. Web. doi:10.1103/PhysRevA.75.013414.
Yoshida, S, Reinhold, Carlos O, Burgdorfer, J, Zhao, W, Mestayer, J J, Lancaster, J C, & Dunning, F B. Dephasing of Stark Wave Packets Induced by Colored Noise. United States. doi:10.1103/PhysRevA.75.013414.
Yoshida, S, Reinhold, Carlos O, Burgdorfer, J, Zhao, W, Mestayer, J J, Lancaster, J C, and Dunning, F B. Mon . "Dephasing of Stark Wave Packets Induced by Colored Noise". United States. doi:10.1103/PhysRevA.75.013414.
@article{osti_932136,
title = {Dephasing of Stark Wave Packets Induced by Colored Noise},
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 = {The time evolution of Stark wave packets in Rydberg atoms under the influence of colored noise is analyzed. The Stark wave packets are generated by exposing K(350p) Rydberg atoms to an electric field step. Their time evolution is monitored using a half-cycle probe pulse that is applied after a variable time delay. The noise is generated by randomly modulating the amplitude of the static field. We show that noise results in an enhanced and irreversible dephasing of Stark quantum beats, as monitored by the damping of the beat amplitude. This source of decoherence is most effective when the characteristic frequency of the noise power spectrum matches the orbital frequency of the Rydberg electron. Noise driven resonant deltan=1 transitions broaden the energy distribution thereby accelerating the dephasing.},
doi = {10.1103/PhysRevA.75.013414},
journal = {Physical Review A},
issn = {1050-2947},
number = 1,
volume = 75,
place = {United States},
year = {2007},
month = {1}
}