Abstract
Quantum and thermal effects on the lifetime of the Davydov soliton are studied. Results of a quantum-mechanical perturbation treatment of the lifetime are presented for a wide range of parameter values. We derive a simple condition on the parameter values that must be satisfied for the soliton to be a viable mechanism for localized energy transport in the Davydov model for the α-helix region of protein. Our conclusion is that the Davydov soliton as originally proposed is not a likely candidate for this mechanism, but that a single soliton with a very large excitation number could provide the mechanism.
- Received 3 February 1992
DOI:https://doi.org/10.1103/PhysRevA.45.8914
©1992 American Physical Society