We develop the path integral method for quantum chemistry, apply the Monte Carlo method to an evaluation of the path integral, and calculate the ensemble average of the energy. For finite temperature, a simple Monte Carlo evaluation of the path integral brings out the negative-sign problem. In this
Finite temperature effects in Na3+ and Na3: A path integral Monte Carlo study
โ Scribed by Randall W. Hall
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 578 KB
- Volume
- 160
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Path integral Monte Carlo techniques are used to study Na: and Na, at finite temperatures.
In accord with previous classical trajectory calculations, we find that vibratIona motion significantly distorts the clusters from the previously predicted zero temperature geometries, due to the flat Born-Oppenheimer potential energy surface. More importantly, these distorted clusters show significant localized electronic bonding, in contrast to the delocalized bonding found in previous studies of the zero temperature
๐ SIMILAR VOLUMES
A transfer-matrix grid path-integral method recently proposed, has been used to study vibrational intramolecular potentials for the ground X ( '&,+.) and excited B ( 51&+U) electronic states of a Br2 molecule solvated in a matrix of argon. The Monte Carlo method has been used to generate the set of