Recent content by emz

Thank you Chalnoth.

Why is photon gas pressure = photon energy density (per volume) divided by 3? Thank you

I thought the definition of a scalar field was the numerical value of the field at a given point to be Lorentz invariant. That is U(\Lambda) \varphi(\Lambdax)=\varphi(x)

A simple, new question on Srednicki's book: Equation 2.26 : U(\Lambda)^{-1} \varphi(x)U(\Lambda)= \varphi(\Lambda^^{-1}x) which describes how a scalar field transforms under Lorentz transformation is not derived in the book. Instead it seems to be inspired by time-translation equation...