RELEVANCE OF OPERATORS IN MODIFIED LATTICE HAMILTONIANS

被引：7

作者：

GUO, SH

ZHENG, WH

LIU, JM

LI, ZB

机构：

[1] UNIV NEW S WALES, SCH PHYS, KENSINGTON, NSW 2033, AUSTRALIA

[2] ZHONGSHAN UNIV, DEPT PHYS, GUANGZHOU 510275, PEOPLES R CHINA

来源：

PHYSICAL REVIEW D | 1991年 / 44卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.44.1269

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The modified Hamiltonians with an exact ground state for lattice gauge theory and the nonlinear sigma model are analyzed in the nonperturbative subtraction scheme. By subtracting operators with lower dimensions, we obtain a subtracted operator DELTA-HBAR which is divergence-free. For a modified Hamiltonian with an exact ground state, DELTA-HBAR is in general relevant. The vacuum functional and low-energy spectrum calculations are discussed.

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页码：1269 / 1273

页数：5

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