Non-locality of pre-Klein-Gordon equation
40683
What's wrong with the square root version of the Klein-Gordon equation?
17339
Is the wave-particle duality a real duality?
132263
Pauli principle for particles very far apart from each other
60289
How does QFT interpret the Negative probability problem of the real scalar fields' Klein-Gordon equation?
116314
On-shell and off-shell transformations in Noether's theorem
48930
Least-action classical electrodynamics without potentials
70880
Invariance of canonical Hamiltonian equation when adding the total time derivative of a function of $q_i$ and $t$ to the Lagrangian
57097
Massless particle in FRW metric
94041
Interpretation Born-Von Karman boundary conditions
130752
Can we treat $\psi^{c}$ as a field independent from $\psi$?
12422
Derivation of $E=pc$ for a massless particle?
104657
Wave/particle duality
48584
Wave-particle duality
983
Use partial or covariant derivatives when deriving equations of a field theory?
157191
Conjugate Variables, Noether's Theorem and QM
141949
Tree level QFT and classical fields/particles
86423
Dimension & non - locality problem in string theory