Monte Carlo Hamiltonian from Stochastic Basis
量子物理
2016-08-15 v2 高能物理 - 格点
摘要
In order to extend the recently proposed Monte Carlo Hamiltonian to many-body systems, we suggest to concept of a stochastic basis. We apply it to the chain of coupled anharmonic oscillators. We compute the spectrum of excited states in a finite energy window and thermodynamical observables free energy, average energy, entropy and specific heat in a finite temperature window. Comparing the results of the Monte Carlo Hamiltonian with standard Lagrangian lattice calculations, we find good agreement. However, the Monte Carlo Hamiltonian results show less fluctuations under variation of temperature.
引用
@article{arxiv.quant-ph/9912051,
title = {Monte Carlo Hamiltonian from Stochastic Basis},
author = {C. Q. Huang and H. Kröger and X. Q. Luo and K. J. M. Moriarty},
journal= {arXiv preprint arXiv:quant-ph/9912051},
year = {2016}
}
备注
revised version, new figures. Text (LaTeX), 4 Figs. (eps), style file