Transfer-Matrix Calculations of the Spin 1/2 Antiferromagnetic XXZ Model on the 4 x2 Triangular Lattice Using the Fractal Decomposition
1991; Oxford University Press; Volume: 85; Issue: 3 Linguagem: Inglês
10.1143/ptp/85.3.481
ISSN1347-4081
AutoresNaomichi Hatano, Masuo Suzuki,
Tópico(s)Physics of Superconductivity and Magnetism
ResumoThe fractal decomposition of exponential operators proposed by Suzuki, which is a new category of the generalized Trotter decomposition valid up to higher orders, is examined with transfer-matrix calculations of the spin 1/2 antiferromagnetic XXZ model on the 4 ×2 triangular lattice. The dependence of correction terms on the Trotter number and temperature are studied. This dependence confirms rapid convergence of the fractal decomposition. The negative-sign problem arising in quantum Monte Carlo simulations is also discussed from the present new point of view.
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