DELTA-EXPANSION FOR A QUANTUM-FIELD THEORY IN THE NONPERTURBATIVE REGIME

被引：12

作者：

BENDER, CM

MILTON, KA

PINSKY, SS

SIMMONS, LM

机构：

[1] UNIV OKLAHOMA,DEPT PHYS & ASTRON,NORMAN,OK 73019

[2] OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210

[3] SANTA FE INST,SANTA FE,NM 87501

[4] UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545

来源：

JOURNAL OF MATHEMATICAL PHYSICS | 1990年 / 31卷 / 11期

关键词：

D O I：

10.1063/1.528975

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The δ expansion, a recently proposed nonperturbative technique in quantum field theory, is used to calculate the dimensionless renormalized coupling constant a λ(φ2)1 + δ quantum field theory in d-dimensional space-time at the critical point defined by λ → ∞ with the renormalized mass held fixed. The calculation is performed to leading order in δ and compared with previous lattice strong-coupling calculations. The numerical results are good and provide new evidence that the theory in four dimensions is free for all δ. © 1990 American Institute of Physics.

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页码：2722 / 2725

页数：4

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