# Talk:Electron electric dipole moment

The definition in the article is similarly ambiguous. In an electric field, the charge itself gives rise to a position-dependent potential energy --- so changing "where" you say the particle is, changes a ${\displaystyle {\bf {E}}\cdot {\bf {d}}}$ contribution by an arbitrary amount.
Mike Stone (talk) 12:16, 20 April 2017 (UTC)