Issue
EPL
Volume 87, Number 3, August 2009
Article Number 31002
Number of page(s) 4
Section The Physics of Elementary Particles and Fields
DOI http://dx.doi.org/10.1209/0295-5075/87/31002
Published online 27 August 2009
EPL, 87 (2009) 31002
DOI: 10.1209/0295-5075/87/31002

Equivalence of the Klein-Gordon random field and the complex Klein-Gordon quantum field

P. Morgan

Physics Department, Yale University - New Haven, CT 06520, USA

peter.w.morgan@yale.edu

received 27 April 2009; accepted in final form 20 July 2009; published August 2009
published online 27 August 2009

Abstract
The difference between a Klein-Gordon random field and the complex Klein-Gordon quantum field is characterized, explicitly comparing the roles played by negative-frequency modes of test functions in creation and annihilation operator presentations of the two theories. The random field and the complex quantum field can both be constructed from the same creation and annihilation operator algebra, making them equivalent in that sense.

PACS
11.10.-z - Field theory.
03.70.+k - Theory of quantized fields.

© EPLA 2009