- #1
jk22
- 729
- 24
Can we explain the cosmological constant in this way ?
The Einstein tensor is derived from the Ricci tensor and one property is that, like the stress-energy tensor, its covariant derivative shall vanish.
Since the covariant derivative of the metric vanishes it can be added to the EFE as ##+\Lambda g_{\mu\nu}##
But then we could add any power of the metric like ##+\Lambda_1 g_{\mu\rho}g^\rho_\nu## ?
The Einstein tensor is derived from the Ricci tensor and one property is that, like the stress-energy tensor, its covariant derivative shall vanish.
Since the covariant derivative of the metric vanishes it can be added to the EFE as ##+\Lambda g_{\mu\nu}##
But then we could add any power of the metric like ##+\Lambda_1 g_{\mu\rho}g^\rho_\nu## ?