Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session N00: Poster Session II (11:30am-2:30pm CST)
11:30 AM,
Wednesday, March 6, 2024
Room: Hall BC
Sponsoring
Unit:
APS/SPS
Abstract: N00.00292 : Microtubule exciton polaron thermodynamic properties and dynamics
Presenter:
NGANFO YIFOUE WILLY ANISET
(University of Dschang)
Author:
NGANFO YIFOUE WILLY ANISET
(University of Dschang)
In this paper, we study the dynamical properties of the exciton-polaron in the microtubule. The study was carried out using a unitary transformation and an approximate diagonalization technique. Analytically, the modeling of exciton-polaron dynamics in microtubules is presented. From this modeling, the ground state energy, mobility, and entropy of the exciton-polaron are derived as a function of the parameters characterizing the microtubule geometry. Numerical results show that, depending on the three vibrational modes (protofilament, helix, antihelix) in MTs, exciton-polaron energy is anisotropic and is more present on the protofilament than the helix and absent on the antihelix. The quasiparticles move only on the protofilaments and helix and when we take into account the variation of the protofilament vibrations by fixing the helix vibrations, the quasi-particles move between the 1st and 2nd protofilaments. When we take into account the variation of the two vibrations the quasi-particles move between the 1st and 15th protofilament. This result confirms the importance of helix vibrations on the dynamics of quasiparticles. The exchange of information between the exciton-polaron and its environment is similar to its mobility. Confirming that the quasiparticles move in the protofilament faster than the helix, the electrical field produced by the vibrations of the MT lattice may be anisotropic depending on the modes of vibration.
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