A molecular dynamics simulation of dephasing in liquid nitrogen
- 15 June 1978
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 68 (12), 5528-5533
- https://doi.org/10.1063/1.435680
Abstract
We relate the dephasing of molecular vibrations in liquids to certain correlation functions involving only the translational and rotational degrees of freedom; these correlation functions are then determined through a classical molecular dynamics simulation of rigid, nonvibrating molecules. Using a Lennard‐Jones atom–atom potential for N2 (liq) near its boiling point, we calculate a dephasing time of 62 psec, in good agreement with picosecond pulse and isotropic Raman linewidth measurements. The importance and characterisic time scales of different dephasing mechanisms are studied, and the significant effect of vibrational anharmonicity is demonstrated.Keywords
This publication has 30 references indexed in Scilit:
- Vibrational resonance energy transfer and dephasing in liquid nitrogen near its boiling point: Molecular computationsThe Journal of Chemical Physics, 1976
- On the quantum dynamics of relaxation of a two-level system coupled to a thermal bathMolecular Physics, 1976
- A molecular dynamics study of vibrational relaxation in a diatomic molecular liquidThe Journal of Chemical Physics, 1976
- Picosecond Spectroscopy of Molecular Dynamics in LiquidsAnnual Review of Physical Chemistry, 1975
- Quantum dynamics of vibrational relaxation in condensed mediaThe Journal of Chemical Physics, 1975
- Calculation of the Widths for Isotropic Parts of Highly-polarized Raman Lines: Vibrational Relaxation of Infrared-inactive LevelsBulletin of the Chemical Society of Japan, 1974
- Infrared and Raman study of liquids. III. Theory of the rotation-vibration coupling effects. Diatomic molecules in inert solutionsPhysical Review A, 1974
- Raman Study of Liquids. I. Theory of the Raman Spectra of Diatomic Molecules in Inert SolutionsPhysical Review A, 1971
- Intensity and Gain Measurements on the Stimulated Raman Emission in LiquidandPhysical Review B, 1969
- RAMAN LINEWIDTHS FOR STIMULATED THRESHOLD AND GAIN CALCULATIONSApplied Physics Letters, 1968