Klein-Gordon-Equation provides a Scalar Theory that doesn't contain Spin
96784
Klein-Gordon-Equation contains no Spin
14342
Solution of Friedmann equation in terms of conformal time
108384
Special Relativity and $E = mc^2$
140576
Time reversal symmetry and T^2 = -1
136473
Is there a scalar acceleration?
34788
Lagrangian for relativistic massless point particle
156636
The Existence of the $^1D$ term and the non-existence of the $^3D$ term?
60289
How does QFT interpret the Negative probability problem of the real scalar fields' Klein-Gordon equation?
45131
Derivation of equations of motion in Nordstrom's theory of scalar gravity?
39299
Einstein Field Equations and Electromagnetic Stress-Energy Tensor
113610
Spinor field normalisation from poles in the propagator
13080
Why is the cosmological constant a scalar?
93835
Why do those terms vanish if the metric is Hermitian?
26817
Quantum Field Theory from a mathematical point of view
23729
Four-velocity in General-relativistic geodesic equation
123497
Quantum Field Theory without LSZ, how is it possible?
29329
Does a four-divergence extra term in a Lagrangian density matter to the field equations?