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Influence of Heat Bath and Disorder on Davydov Solitons

  • Wolfgang Förner
  • János Ladik
Part of the NATO ASI Series book series (NSSB, volume 243)

Abstract

With the help of the so-called /D2> state vector ansatz the dynamics of Davydov solitons is investigated. The soliton remains stable against aperiodicity in the sequences of masses, spring constants, and coupling constants. However, already a small aperiodicity in the sequence of dipole interaction energies (> ±2.5% \(\overline {\text{J}} \)) destroys the soliton. For values of the parameters typical for polypeptide ∝-helices the soliton is stable up to 30K. For a temperature of T = 300K stable solitons can be found only for spring constants \(\overline {\text{W}} \) ⩾ 40N/m and coupling constants \(\overline {\text{W}} \) ⩾ 50 pN. These values of \(\overline {\text{X}} \) are much larger than those usually accepted for proteins (\(\overline {\text{W}} \) = 13 N/m).

Keywords

Solitary Wave Spring Constant Heat Bath Natural Amino Acid Lattice Relaxation Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Wolfgang Förner
    • 1
  • János Ladik
    • 1
  1. 1.Chair for Theoretical Chemistry and Laboratory of the National Foundation for Cancer ResearchFriedrich-Alexander-University Erlangen-NürnbergErlangenGermany

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