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The lifetime of the soliton in the improved Davydov model at the biological temperature 300 K for protein molecules

  • Pang Xiao-feng
Article

Abstract:

We study the effects of quantum fluctuations and thermal perturbations on the lifetime of the soliton in the improved Davydov model proposed by us with two-quanta and with an added interaction. By using quantum perturbation theory, we compute the soliton lifetime for a wide ranges of parameter values relevant for protein molecules. The lifetime of the new soliton at the biological temperature 300 K is of the order of 10-10 second or τ/τ0 ≥ 500 for parameters appropriate to α-helical protein molecules. This shows clearly that the new soliton in the improved model is a viable mechanism for the bio-energy transport in the α-helix region of proteins.

PACS. 87.15.He Dynamics and conformational changes – 31.50.+w Excited states – 36.20.-r Macromolecules and polymer molecules – 65.20.+w Heat capacities of liquids 

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Copyright information

© EDP Sciences, Springer-Verlag 2001

Authors and Affiliations

  • Pang Xiao-feng
    • 1
    • 2
    • 3
    • 4
  1. 1.University of Electronic Science and Technology of ChengduInstitute of High-energy ElectronicsChina
  2. 2.Chinese Academy of SciencesInternational Center for Material PhysicsShenyangChina
  3. 3.Department of PhysicsUniversity of KaiserslauternKaiserslauternGermany
  4. 4.Chinese Center of Advanced Science and Technology (World Lab.)BeijingChina

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