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2019 , Vol. 38 >Issue 5: 5

DOI: https://doi.org/10.16854 /j.cnki.1000-0712.180476

Three kinds of ordering formulas for vacuum projection operators and their applications

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  • 1.School of Electronic Engineering，Huainan Normal University，Huainan，Anhui 232038，China; 2.Department of Material Science and Engineering，University of Science and Technology of China，Hefei，Anhui 230026，China

Received date: 2018-08-28

  Revised date: 2018-12-27

  Online published: 2019-06-10

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Abstract

Three kinds of ordering formulas for the vacuum projector | 0?? 0 | ，i .e.，normally ordered-，antinormally

ordered- and Weyl ordered-forms，are derived systematically and concisely. It is further deduced that

many more operator identities play important roles in calculating various physical quantities.

Key words： vacuum projection operators; normal ordering; anti-normal ordering; Weyl ordering

Cite this article

ZHANG Chun-zao, REN Gang, FAN Hong-yi . Three kinds of ordering formulas for vacuum projection operators and their applications[J]. College Physics, 2019 , 38(5) : 5 . DOI: 10.16854 /j.cnki.1000-0712.180476

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