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 tau/tau (0) greater than or equal to 500 for parameters appropriate to alpha -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 alpha -helix region of proteins.
部门归属
univ elect sci & technol china, inst high energy elect, chengdu 610054, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china. univ kaiserslautern, dept phys, d-67663 kaiserslautern, germany. china ctr adv sci & technol, world lab, beijing 100080, peoples r china.;pang, xf (reprint author), univ elect sci & technol china, inst high energy elect, chengdu 610054, peoples r china
X. F. Pang. The lifetime of the soliton in the improved Davydov model at the biological temperature 300 K for protein molecules[J]. European Physical Journal B,2001,19(2):297-316.
APA
X. F. Pang.(2001).The lifetime of the soliton in the improved Davydov model at the biological temperature 300 K for protein molecules.European Physical Journal B,19(2),297-316.
MLA
X. F. Pang."The lifetime of the soliton in the improved Davydov model at the biological temperature 300 K for protein molecules".European Physical Journal B 19.2(2001):297-316.
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