• Publications
  • Influence
Controlling chaos using nonlinear feedback with delay.
We generalize a method of control of chaos that uses delayed feedback at the period of an unstable orbit to stabilize that orbit. The generalization consists of substituting some portion of theExpand
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Application of a generalized Feynman-Hellmann theorem to bound-state energy levels.
  • Lichtenberg
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 15 December 1989
We derive a generalization of the Feynman-Hellmann theorem and use it to describe how the energy of a bound state changes with the change in mass of one of the constituent particles.
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Synchronization of regular and chaotic systems.
We investigate the synchronization between two systems consisting of coupled circle maps that have a common drive, which may be chaotic or regular. We observe several new aspects of chaotic andExpand
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Energy transitions and time scales to equipartition in the Fermi-Pasta-Ulam oscillator chain.
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Diffusion through a stochastic web.
  • Lichtenberg, Wood
  • Physics, Medicine
  • Physical review. A, General physics
  • 15 February 1989
A connected web of stochasticity can be generated by a mapping derived from a linear oscillator perturbed by a periodic \ensuremath{\delta} function. Such a stochastic web is useful for investigatingExpand
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Color-hyperfine splitting in heavy-quarkonium P states from perturbative QCD with a running coupling strength.
  • Lichtenberg, Potting
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 1 September 1992
We obtain an expression for the color-hyperfine interaction in heavy quarkonium in perturbative QCD including terms up to one loop, but going beyond one loop by letting the strong-interactionExpand
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Spin-triplet superconductivity in Sr2RuO4 probed by andreev reflection
The superconducting gap function of Sr2RuO4 was investigated by means of quasiparticle reflection and transmission at the normal conductor-superconductor interface of Sr2RuO4-Pt point contacts. WeExpand
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Predicting the masses of baryons containing one or two heavy quarks.
The Feynman-Hellmann theorem and semiempirical mass formulas are used to predict the masses to baryons containing one or two heavy quarks. In particular, the mass of the {Lambda}{sub {ital b}} isExpand
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Nature of the electronic states in the layered perovskite noncuprate superconductor Sr2RuO4.
Near-edge x-ray-absorption and photoemission spectra of the noncuprate superconductor Sr{sub 2}RuO{sub 4} are presented. Holes close to the Fermi level are determined by Ru 4{ital d}{sub {ital xy}},Expand
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Arnold diffusion in weakly coupled standard maps.
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