= Quantization of a periodic soliton coordinate
{title2=$\alpha_0\sim\alpha_0+2\pi\quad\Longrightarrow\quad p_{\alpha_0}\in\hbar\mathbb Z$}
The conjugate <momentum> to a periodic internal soliton angle generates shifts of that angle. Single-valued wavefunctions, or <Bohr-Sommerfeld quantization> with zero <Maslov index>, quantize this <canonical momentum>. A theta term can shift the relation between <canonical momentum> and mechanical charge without changing integer canonical labels.
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