Past exam of the mathematics course of the University of Cambridge / 2024 / iii / Paper 306 / 3 / ii

Table of contents
- Solution ii

Solution

Normal ordering defines a composite field by subtracting all singular self-contractions before bringing its constituent points together. For example,

: \partial X \partial X : (z) = lim_{w \to z} [\partial X (z) \partial X (w) - ⟨ \partial X (z) \partial X (w)⟩] .

This makes

T

and

\overset{ˉ}{T}

well-defined local operators and is equivalent in oscillator language to placing creation operators to the left of annihilation operators.

 Ancestors (10)

 View article source

 Discussion (0)

There are no discussions about this article yet.

 Articles by others on the same topic (0)

There are currently no matching articles.

  See all articles in the same topic Create my own version