✎ Vacuum Expectation Value [The Physics Travel Guide]

You've loaded an old revision of the document! If you save it, you will create a new version with this data.

====== Vacuum Expectation Value ======

Vacuum expectation values are important to describe the [[advanced_notions:symmetry_breaking:higgs_mechanism|Higgs mechanism]] and [[advanced_notions:symmetry_breaking|symmetry breaking]] in general.

In classical field theory, we are interested in the solutions of the Yang-Mills equations and these correspond to critical points of the [[frameworks:lagrangian_formalism|action]].

In contrast, in quantum field theory, we use the action to compute "vacuum expectation values" of observables. A vacuum expectation value is the average measured value in the vacuum state. The thing is that many physically interesting quantities can be expressed as vacuum expectation values through various tricks.

<note tip>
Explanations in this section should contain no formulas, but instead colloquial things like you would hear them during a coffee break or at a cocktail party.
</note>
  
<tabbox Student>

<note tip>
In this section things should be explained by analogy and with pictures and, if necessary, some formulas.
</note>
 
<tabbox Researcher>

<note tip>
The motto in this section is: //the higher the level of abstraction, the better//.
</note>

--> Example1#

<--

--> Example2:#

<--

</tabbox>

Please solve the following equation to prove you're human. 148 -9 = Please keep this field empty:

Edit summary

Note: By editing this page you agree to license your content under the following license: CC Attribution-Share Alike 4.0 International

User Tools

Site Tools

Page Tools