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