Applying the linear δ expansion to theiφ3interaction
Applying the linear δ expansion to theiφ3interaction
复制标题
将线性 δ 展开应用于它们的 φ3 相互作用
DOI:
10.1103/physrevd.57.5092
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发表时间:
1997
影响因子:
5
通讯作者:
A. P. Korte
中科院分区:
文献类型:
--
作者:
M. Blencowe;H. Jones;A. P. Korte
The linear $\delta$ expansion (LDE) is applied to the Hamiltonian $H=(p^2 +m^2 x^2)/2 + igx^3$, which arises in the study of Lee-Yang zeros in statistical mechanics. Despite being non-Hermitian, this Hamiltonian appears to possess a real, positive spectrum. In the LDE, as in perturbation theory, the eigenvalues are naturally real, so a proof of this property devolves on the convergence of the expansion. A proof of convergence of a modified version of the LDE is provided for the $ix^3$ potential in zero dimensions. The methods developed in zero dimensions are then extended to quantum mechanics, where we provide numerical evidence for convergence.