Talk:Unitarity gauge

Who introduced the unitary gauge? (comment March 21st, 2019)

The page says it was Weinberg, but something very similar was done by Schroedinger in the case of scalar QED much earlier, see his letter: Nature vol. 169 (1952), 538. He considers there complex scalar fields ψ coupled to electromagnetic field, and introduces a gauge transformation which shifts the gauge field by a logarithm of ψ/ψ*, which is 2i times a phase of ψ! (see his eqs. (6) and (7)). I think it is worth mentioning. He also cites even earlier papers by Gordon, Klein and himself from 1926/27, where it could have been done, but I didn't check.

SMD — Preceding unsigned comment added by 2001:18E8:2:28B9:F000:0:0:856 (talk) 16:00, 21 March 2019 (UTC)