In

electromagnetism, the

**Lorenz gauge**,

**Lorentz Condition** or

**Lorenz gauge condition** is a partial gauge fixing of the electromagnetic vector potential

?. The condition is that ??. This does not completely fix the gauge: one can still make a gauge transformation where is a

harmonic scalar function

? (that is, a scalar function

? satisfying , the equation of a massless scalar field

?).

The

**Lorenz condition?** is used to eliminate the redundant spin-0 component in the (1/2,1/2) representation of the Lorentz group

?. It is equally used for massive spin-1 fields where the concept of gauge transformations does not apply at all.

The

**Lorenz condition?** is named after

Ludvig Lorenz. It is a

**Lorentz invariant condition**, and is frequently called the "

**Lorentz condition**" because of confusion with

Hendrik Lorentz, after whom Lorentz covariance

? is named.

Wikipedia, Lorentz Condition
See Also

**Bearden on Tesla and EM Source Charge** discussion

**Lorenz condition?**
**Lorentz**
**Lorentz Force**
**Ludvig Lorenz**