查看“︁真空期望值”︁的源代码

{{Expand English|time=2020-02-04T03:06:17+00:00}}
在[[量子场论]]中，[[算符]]<var>O</var> 的'''真空期望值''' (或VEV) 是其[[真空態|真空]]的平均或[[期望值 (量子力學)|期望值]] <math>\langle O\rangle.</math>

== 引用 ==

* [[卡西米爾效應|卡西米尔效应]]
* [[自发对称破缺]]
* [[希格斯玻色子|希格斯场]] 的真空期望值是246 [[電子伏特|GeV]]，<ref>{{Cite journal|title=Review of Particle Physics⁎|url=http://pdglive.lbl.gov/Rsummary.brl?nodein=S044&fsizein=1|last=Amsler|first=C.|last2=Doser|first2=M.|journal=Physics Letters B|accessdate=2015-09-04|doi=10.1016/j.physletb.2008.07.018|year=2008|volume=667|pages=1|bibcode=2008PhLB..667....1A|archiveurl=https://archive.today/20120712165412/http://pdglive.lbl.gov/Rsummary.brl?nodein=S044&fsizein=1|archivedate=2012-07-12|laydate=Blusk|last3=Antonelli|first3=M.|last4=Asner|first4=D.|last5=Babu|first5=K.|last6=Baer|first6=H.|last7=Band|first7=H.|last8=Barnett|first8=R.|last9=Bergren|first9=E.}}</ref> 导致了[[标准模型]]的[[希格斯机制]]。<math>v = 1/\sqrt{\sqrt 2 G_F^0} = 2M_W/g \approx 246.22\, \rm{GeV}</math>

== 参见 ==

* [[真空能量]]
* [[暗能量]]

== 参考文献 ==
{{Reflist}}

{{Quantum field theory}} 
{{String theory}}
[[Category:標準模型]]
[[Category:量子场论]]