Vibron transport in macromolecular chains with squeezed phonons
https://doi.org/10.17586/2220-8054-2018-9-5-597-602
Abstract
We investigate physical properties of a single vibronic intramolecular excitation propagating through a macromolecule, whose vibrational state can be described as a squeezed vacuum state. For a theoretical description of such a process, the partial dressing method of the vibronic excitation due to its interaction with phonons is used. We study the influence of the model parameters and strength of squeezing on the vibron dressing. It is demonstrated that for certain critical values of the model parameters a polaron crossover can occur, at which there is a sharp change in the migration nature of a vibron from the practically free to the heavy quasiparticle dressed by a phonon cloud. Increasing the strength of phonon squeezing is shown to increase the critical values of the model parameters, so that for high phonon squeezing the polaron crossover takes place in the very strong-coupling and adiabatic regime.
Supporting agencies: This work is partly supported by the bilateral project between the Serbian Ministry of Education and Science and “Theory of Condensed Matter” at JINR, Dubna, and by Serbian Ministry of Education and Science, under Contract Nos. III–45010 and III–45005.
About the Authors
D. Cevizovi ˇ c
Vinca Institute of Nuclear Sciences
Serbia
Serbia
11001 Belgrade
A. V. Chizhov
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research; Dubna State University
Russian Federation
Russian Federation
Joliot-Curie, 6, Dubna, 141980
S. Galovic
Vinca Institute of Nuclear Sciences
Serbia
Serbia
11001 Belgrade
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Review
For citations:
Cevizovi ˇ c D., Chizhov A.V., Galovic S. Vibron transport in macromolecular chains with squeezed phonons. Nanosystems: Physics, Chemistry, Mathematics. 2018;9(5):597-602. https://doi.org/10.17586/2220-8054-2018-9-5-597-602
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