# Can the Biot-Savart law be derived from QED?

It's important that a new theory of physics contains the equations and results of previous related ones. Maxwell theory and QED both have explanations for electromagnetic phenomena so I'm wondering if the Biot-Savart law can be derived in QED.

• Biot-Savart's law is a consequence of Maxwells equations and Maxwells equations are the same in QED as it in classical electrodynamics so the derivation (in terms of the current density) should be pretty much the same (see e.g. this). – Winther May 31 '16 at 1:33