Energy-momentum tensor of a fluid for scalar fields
59100
Does metric signature affect the stress energy tensor?
99194
Scale invariance symmetry as a simple argument in an electrostatics problem
79068
Is energy conserved in general relativity? Does $\nabla_aT^{ab}_{\rm matter}=0$ represent the conservation of energy and momentum?
69983
Photon energy - momentum in matter
66939
Picturing the how the covariant derivative acts on vector fields
64247
Noether Theorem and Energy conservation in classical mechanics
96283
Finding the metric tensor from the Einstein field equation?
31939
Combining Stokes and Divergence Theorem
68523
Am I doing this right? Finding the time derivative of expectation value of momentum
116427
$(c^{\mu}\partial_{\mu}-m)\phi(x)=0$ not Lorentz-invariant?
56206
Symmetry of the $3\times 3$ Cauchy Stress Tensor
105660
Invariance of action $\Rightarrow$ covariance of field equations?
62692
Retrieving Maxwell's equations from the minimum action principle
15731
When is stress-energy tensor defined as variation of action with respect to metric conserved?
63807
Scalar Field Theories
59021
What is the most general expression for the coordinate representation of momentum operator?
99063
Einstein-Hilbert action as an effective field theory