- #1
evilcman
- 41
- 2
I am reading the book The Early Universe by Kolb and Turner and found the following:
"In the strictest mathematical sense the universe cannot be in thermal equilibrium, as the FRW cosmological model does not possesses a time-like Killing vector".
It is just a matter of calculations to show that the Killing-equation does not have a
time-like solution in the Robertson-Walker metric, but I don't know how this implies anything
about thermal equilibrium. The books I have do not treat relativistic thermodynamics,
can someone explain this or point me to a good reference?
"In the strictest mathematical sense the universe cannot be in thermal equilibrium, as the FRW cosmological model does not possesses a time-like Killing vector".
It is just a matter of calculations to show that the Killing-equation does not have a
time-like solution in the Robertson-Walker metric, but I don't know how this implies anything
about thermal equilibrium. The books I have do not treat relativistic thermodynamics,
can someone explain this or point me to a good reference?