Kinetic momentum and magnetic pseudomomentum
= Kinetic momentum and magnetic pseudomomentum
For charge $e$, define
$$
\pi=p-eA,\qquad K=p+eA.
$$
In the symmetric gauge,
$$
[K_i,\pi_j]=0,
\qquad
[K_i,K_j]=-ie\hbar\varepsilon_{ijk}B_k.
$$
= Kinetic momentum and magnetic pseudomomentum
For charge $e$, define
$$
\pi=p-eA,\qquad K=p+eA.
$$
In the symmetric gauge,
$$
[K_i,\pi_j]=0,
\qquad
[K_i,K_j]=-ie\hbar\varepsilon_{ijk}B_k.
$$