Solving Ambiguity in QFT in Curved Spacetime

[fxdung]

I know that motion equation in field theory deriving in GR is not uniquely.How do we solve this ambiguousness of QFT in curved spcetime?

 

[atyy]

In the classical theory, one way is to also require the condition that spacetimes be globally hyperbolic.

 

[martinbn]

It isn't very clear what the question is. What non-uniqueness are you referring to?

 

[fxdung]

Eg, we can have two forms of Klein-Gordon equation of scalar field in GR,

 

[PeterDonis]

we can have two forms of Klein-Gordon equation of scalar field in GR,

Can you write them down?

 

[fxdung]

See page70 General Relativity of Wald.

 

[PeterDonis]

See page70 General Relativity of Wald.

Sorry, if you can't even be bothered to post the equations you're asking about, we can't be bothered to reply. Thread closed.