How one can define a spin in Qunatum Filed Theory in curved spacetime. If the(adsbygoogle = window.adsbygoogle || []).push({});

space is flat it's invarainat under Poincare group - so in particular it's invariant under SO(3).

Spin operators are simply generators of SO(3). If the space isn't flat we cannot define

spin in this way. I know that in curved spacetime we should think of fileds rather than particles,

because notion of particle is not always well defined. So maybe better question is

how we define spin in globally hyberbolic and stationary spacetime?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Spin in QFT

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**