Variables in the Dirac Equation Lagrangian
130752
Can we treat $\psi^{c}$ as a field independent from $\psi$?
51122
Lagrangian of Schrodinger field
112073
What does a Lagrangian of the form $L=m^2\dot x^4 +U(x)\dot x^2 -W(x)$ represent?
150081
Deriving Lagrangian density for electromagnetic field
3603
Lagrangian and Hamiltonian EOM with dissipative force
11358
Eigenvalues of the Lagrangian?
111611
When can we add a total time derivative of $f(q, \dot{q}, t)$ to a Lagrangian?
63304
The Dirac-delta function as an initial state for the quantum free particle
96880
How to obtain Hamiltonian formalism and phase space for Lagrangian with second-derivatives?
135071
Energy momentum tensor from Noether's theorem
122166
Significance of $i$ in the Schrödinger equation
153727
Constant term in Lagrangian
44953
Gauge symmetries and elementary particles
87141
Represent Dirac distruibution as a combination of derivatives of continuous functions?
120474
Does the lagrangian contain all the information about the representations of the fields in QFT?
73045
Transitioning between Lagrangian and Eulerian fluid variables
80342
Plane waves solutions for Dirac equation in terms of eigenstates of helicity