The Dirac function derivative potential
10587
Bound states of the $V(x)=\pm \delta'^{(n)}(x)$ potential?
77318
Why do we consider potential energy function $U(x)$ differentiable?
63473
Is the shorthand $ \partial_{\mu} $ strictly a partial derivative in field theory?
100098
Chemical potential of particles with zero mass
121584
Rigor in quantum field theory
89057
How does one properly define the derivative of one operator-valued function?
45304
How to prove that the derivative of Heaviside's unit step function is the Dirac delta?
17414
Lagrangian of an effective potential
116513
Distributional Laplacian of logarithm and the Dirac delta distribution
45803
Integral of Derivative squared
101727
Dirac's remark that inspired Feynman when formulating path integral
155043
Substitution $\partial_\mu \to D_\mu \equiv \partial_\mu + ieA_\mu$ allows the introduction of electromagnetic interactions
69764
Potential inside a polarized sphere
28946
Derivation of Spin Lagrangian
51122
Lagrangian of Schrodinger field
37598
Deriving the Lorentz force from velocity dependent potential
146926
Why don't products of Dirac deltas integrate correctly?