Back to Search
Start Over
Phonons of metallic hydrogen with quantum Monte Carlo.
- Source :
- Journal of Chemical Physics; 1/28/2022, Vol. 156 Issue 4, p1-9, 9p
- Publication Year :
- 2022
-
Abstract
- We describe a simple scheme to perform phonon calculations with quantum Monte Carlo (QMC) methods and demonstrate it on metallic hydrogen. Because of the energy and length scales of metallic hydrogen and the statistical noise inherent to QMC methods, the conventional manner of calculating force constants is prohibitively expensive. We show that our alternate approach is nearly 100 times more efficient in resolving the force constants needed to calculate the phonon spectrum in the harmonic approximation. This requires only the calculation of atomic forces, as in the conventional approach, and otherwise little or no programmatic modification. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 156
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 154998668
- Full Text :
- https://doi.org/10.1063/5.0077749