Investigating magnetic properties by quantum Monte Carlo simulations

2004 ◽  
Vol 281 (2-3) ◽  
pp. 240-246 ◽  
Author(s):  
H.Q. Lin ◽  
H.Y. Shik ◽  
Y.Q. Wang ◽  
C.D. Batista ◽  
J.E. Gubernatis
Keyword(s):  
Monte Carlo ◽  
Magnetic Properties ◽  
Monte Carlo Simulations ◽  
Quantum Monte Carlo ◽  
Quantum Monte Carlo Simulations

STUDY ON REGULAR DILUTIONS OF $S=\frac{1}{2}$ IMPURITY IN S=1 CHAINS BY QUANTUM MONTE CARLO SIMULATIONS

2003 ◽  
Vol 17 (31n32) ◽  
pp. 5951-5959 ◽  
Author(s):  
HUAWEN WANG ◽  
ZHAOXIN XU ◽  
HEPING YING ◽  
JUN ZHANG
Keyword(s):  
Monte Carlo ◽  
Magnetic Properties ◽  
Monte Carlo Simulations ◽  
Ground State ◽  
Quantum Monte Carlo ◽  
Cluster Algorithm ◽  
Unit Cell ◽  
Quantum Monte Carlo Simulations

We investigate the variant regularly diluted situations of [Formula: see text] in S=1 isotropic antiferromagnetic chains by the quantum Monte Carlo loop cluster algorithm. Our results manifest significant different magnetic properties in the ground state with respect to the odd (even) host S=1 spins in one unit cell with an impurity S=1/2, and the doped system gradually transits to the pure Haldane chain in two different tendencies with the decreasing of the impurity concentrations.

Quantum Monte Carlo Simulations of Adulteration Effect on Bond Alternating Spin=1/2 Chain

2007 ◽  
Vol 22 (07n10) ◽  
pp. 741-748
Author(s):  
Peng Zhang ◽  
Zhaoxin Xu ◽  
Heping Ying ◽  
Jianhui Dai ◽  
Peter Crompton
Keyword(s):  
Monte Carlo ◽  
Magnetic Properties ◽  
Monte Carlo Simulations ◽  
Finite Temperature ◽  
Quantum Monte Carlo ◽  
Cluster Algorithm ◽  
Heisenberg Chain ◽  
Bond Alternation ◽  
Quantum Monte Carlo Simulations

The S =1/2 Heisenberg chain with bond alternation and randomness of antiferromagnetic (AFM) and ferromagnetic (FM) interactions is investigated by quantum Monte Carlo simulations of loop/cluster algorithm. Our results have shown interesting finite temperature magnetic properties of this model. The relevance of our study to former investigation results is discussed.

scholarly journals Understanding Quantum Tunneling through Quantum Monte Carlo Simulations

2016 ◽  
Vol 117 (18) ◽  
Author(s):  
Sergei V. Isakov ◽  
Guglielmo Mazzola ◽  
Vadim N. Smelyanskiy ◽  
Zhang Jiang ◽  
Sergio Boixo ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Quantum Monte Carlo ◽  
Quantum Tunneling ◽  
Quantum Monte Carlo Simulations

MATHEMATICAL BASIS OF COMPUTATIONAL PHYSICS

1996 ◽  
Vol 07 (03) ◽  
pp. 355-359 ◽  
Author(s):  
M. SUZUKI
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Quantum Monte Carlo ◽  
Computational Physics ◽  
Numerical Calculations ◽  
Symplectic Integration ◽  
Mathematical Basis ◽  
Small Parameters ◽  
Quantum Monte Carlo Simulations

The present paper explains some general basic formulas concerning quantum Monte Carlo simulations, symplectic integration and other numerical calculations. A generalization of the BCH formula is given with an application to the decomposition of exponential operators in the presence of small parameters.

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