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.
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Received 7 January 1999 and Received in final form 16 August 2000
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Xiao-feng, P. The lifetime of the soliton in the improved Davydov model at the biological temperature 300 K for protein molecules. Eur. Phys. J. B 19, 297–316 (2001). https://doi.org/10.1007/s100510170339
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DOI: https://doi.org/10.1007/s100510170339