Every resource I can find that discusses the Aharonov-Bohm effect states that the phase shift(adsbygoogle = window.adsbygoogle || []).push({}); in SI unitsis given by

[tex]\Delta\varphi=\frac{e}{\hbar}\oint{A\cdot dx}

[/tex]

but in Ahranov and Bohm's original 1959 paper (and their subsequent 1961 paper) it is given as

[tex]\Delta\varphi=\frac{e}{c\hbar}\oint{A\cdot dx}

[/tex]

I don't understand where the factor of c comes from. Does anyone have any ideas?

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# Aharanov-Bohm question

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