We study the effect of a dissipative environment on the orientational relaxation of a three-dimensional quantum linear rotor. We provide a derivation of the Hamiltonian of a linear rotor coupled to a harmonic bath from first principles, confirming earlier conjectures. The dynamics generated by this Hamiltonian is investigated by the hierarchical equations-of-motion method assuming a Drude spectral density of the bath. We perform numerically accurate simulations and analyze the behavior of orientational correlation functions and the rotational structures of infrared absorption and Raman scattering spectra. We explore the features of orientational correlation functions and their spectra for a wide range of system-bath couplings, bath memory times, and temperatures. We discuss the signatures of the orientational relaxation in the underdamped regime, the strongly damped regime, and the librational regime. We show that the behavior of orientational correlation functions and their spectra can conveniently be analyzed in terms of three characteristic times, which are explicitly expressed in terms of the parameters of the Hamiltonian.
Skip Nav Destination
Article navigation
21 July 2019
Research Article|
July 15 2019
Orientational relaxation of a quantum linear rotor in a dissipative environment: Simulations with the hierarchical equations-of-motion method
Special Collection:
Dynamics of Open Quantum Systems
Lipeng Chen
;
Lipeng Chen
a)
Department of Chemistry, Technische Universität München
, D-85747, Garching, Germany
Search for other works by this author on:
Maxim F. Gelin
;
Maxim F. Gelin
Department of Chemistry, Technische Universität München
, D-85747, Garching, Germany
Search for other works by this author on:
Wolfgang Domcke
Wolfgang Domcke
Department of Chemistry, Technische Universität München
, D-85747, Garching, Germany
Search for other works by this author on:
a)
Electronic mail: chen0846.chen@tum.de
Note: This paper is part of a JCP Special Topic on Dynamics of Open Quantum Systems.
J. Chem. Phys. 151, 034101 (2019)
Article history
Received:
April 27 2019
Accepted:
June 21 2019
Citation
Lipeng Chen, Maxim F. Gelin, Wolfgang Domcke; Orientational relaxation of a quantum linear rotor in a dissipative environment: Simulations with the hierarchical equations-of-motion method. J. Chem. Phys. 21 July 2019; 151 (3): 034101. https://doi.org/10.1063/1.5105375
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Pay-Per-View Access
$40.00
Citing articles via
DeePMD-kit v2: A software package for deep potential models
Jinzhe Zeng, Duo Zhang, et al.
Related Content
Linear absorption spectrum of a quantum two-dimensional rotator calculated using a rotationally invariant system-bath Hamiltonian
J. Chem. Phys. (August 2018)
Open quantum dynamics of a three-dimensional rotor calculated using a rotationally invariant system-bath Hamiltonian: Linear and two-dimensional rotational spectra
J. Chem. Phys. (July 2019)
What can be learned about molecular reorientation from single molecule polarization microscopy?
J. Chem. Phys. (August 2006)