MISC

2004年8月

A recursive method of the stochastic state selection for quantum spin systems

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • T Munehisa
  • ,
  • Y Munehisa

73
8
開始ページ
2245
終了ページ
2251
記述言語
英語
掲載種別
DOI
10.1143/JPSJ.73.2245
出版者・発行元
PHYSICAL SOC JAPAN

In this paper we propose the recursive stochastic state selection method, an extension of the recently developed stochastic state selection method in Monte Carlo calculations for quantum spin systems. In this recursive method we use intermediate states to define probability functions for stochastic state selections. Then we can diminish variances of samplings when we calculate expectation values of the powers of the Hamiltonian. In order to show the improvement we perform numerical calculations of the spin-1/2 anti-ferromagnetic Heisenberg model on the triangular lattice. Examining results on the ground state of the 21-site system we confide this method in its effectiveness. We also calculate the lowest and the excited energy eigenvalues as well as the static structure factor for the 36-site system. The maximum number of basis states kept in a computer memory for this system is about 3.6 x 10(7). Employing a translationally invariant initial trial state, we evaluate the lowest energy eigenvalue within 0.5% of the statistical errors.

リンク情報
DOI
https://doi.org/10.1143/JPSJ.73.2245
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000223630900036&DestApp=WOS_CPL
ID情報
  • DOI : 10.1143/JPSJ.73.2245
  • ISSN : 0031-9015
  • Web of Science ID : WOS:000223630900036

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