We detail several interesting features in the dynamics of an equilaterally shaped electronic excitation-transfer (EET) trimer with distance-dependent intermonomer excitation-transfer couplings. In the absence of electronic-vibrational coupling, symmetric and antisymmetric superpositions of two single-monomer excitations are shown to exhibit purely constructive, oscillatory, and purely destructive interference in the EET to the third monomer, respectively. In the former case, the transfer is modulated by motion in the symmetrical framework-expansion vibration induced by the Franck–Condon excitation. Distortions in the shape of the triangular framework degrade that coherent EET while activating excitation transfer in the latter case of an antisymmetric initial state. In its symmetrical configuration, two of the three single-exciton states of the trimer are degenerate. This degeneracy is broken by the Jahn–Teller-active framework distortions. The calculations illustrate closed, approximately circular pseudo-rotational wave-packet dynamics on both the lower and the upper adiabatic potential energy surfaces of the degenerate manifold, which lead to the acquisition after one cycle of physically meaningful geometric (Berry) phases of π. Another manifestation of Berry-phase development is seen in the evolution of the vibrational probability density of a wave packet on the lower Jahn–Teller adiabatic potential comprising a superposition of clockwise and counterclockwise circular motions. The circular pseudo-rotation on the upper cone is shown to stabilize the adiabatic electronic state against non-adiabatic internal conversion via the conical intersection, a dynamical process analogous to Slonczewski resonance. Strategies for initiating and monitoring these various dynamical processes experimentally using pre-resonant impulsive Raman excitation, short-pulse absorption, and multi-dimensional wave-packet interferometry are outlined in brief.
Skip Nav Destination
Dynamics of an excitation-transfer trimer: Interference, coherence, Berry’s phase development, and vibrational control of non-adiabaticity
CHORUS
Article navigation
28 March 2023
Research Article|
March 24 2023
Dynamics of an excitation-transfer trimer: Interference, coherence, Berry’s phase development, and vibrational control of non-adiabaticity
Jeffrey A. Cina
Jeffrey A. Cina
a)
(Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Writing – original draft, Writing – review & editing)
Department of Chemistry and Biochemistry, Oregon Center for Optical, Molecular, and Quantum Science, University of Oregon
, Eugene, Oregon 97403, USA
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
a)Author to whom correspondence should be addressed: [email protected]
J. Chem. Phys. 158, 124307 (2023)
Article history
Received:
December 18 2022
Accepted:
February 28 2023
Citation
Jeffrey A. Cina; Dynamics of an excitation-transfer trimer: Interference, coherence, Berry’s phase development, and vibrational control of non-adiabaticity. J. Chem. Phys. 28 March 2023; 158 (12): 124307. https://doi.org/10.1063/5.0139174
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
DeePMD-kit v2: A software package for deep potential models
Jinzhe Zeng, Duo Zhang, et al.
CREST—A program for the exploration of low-energy molecular chemical space
Philipp Pracht, Stefan Grimme, et al.
Rubber wear: Experiment and theory
B. N. J. Persson, R. Xu, et al.
Related Content
Nanothermodynamics of large iron clusters by means of a flat histogram Monte Carlo method
J. Chem. Phys. (September 2014)
Lorentz-like force emerging from kinematic interactions between electrons and nuclei in molecules: A quantum mechanical origin of symmetry breaking that can trigger molecular chirality
J. Chem. Phys. (February 2017)
Melting of “non-magic” argon clusters and extrapolation to the bulk limit
J. Chem. Phys. (January 2014)
Microcanonical Monte Carlo of Lennard-Jones microclusters
J. Chem. Phys. (September 2024)