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(Seminar) Accurate Study from Adaptive Perturbation Method
2020-10-21  【 】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

 Seminar

Title

题目

Accurate Study from Adaptive Perturbation Method

Speaker

报告人

马承德

Affiliation

所在单位

South China Normal University; University of Cape Town

Date

日期

2020年10月21日(周三)9:30-11:30

Venue

地点

南楼6420

Contact Person

所内联系人

李理

Abstract

摘要

The adaptive perturbation method decomposes a Hamiltonian by the diagonal elements and non-diagonal elements of the Fock state. The diagonal elements of the Fock state are solvable but can contain the information about interacting constants. The exact solution for each perturbed term can obtain in the harmonic oscillator with the interacting potential, λ1x4/6+λ2x6/120, where λ1 and λ2 are coupling constants, and x is the position operator. We demonstrate the accurate study of the spectrum and <x2> up to the next leading-order correction. In particular, we study a similar problem of Higgs field from the inverted mass term to demonstrate the possible non-trivial application of particle physics.
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