Distinct Minkowski Spaces from BMS Supertranslations

Understand

This work provides a smooth and everywhere well-defined extension of Bondi-Metzner-Sachs (BMS) supertranslations into the bulk of Minkowski space.

• The supertranslations lead to physically distinct spacetimes, all isometric to Minkowski space.
• This construction is in contrast to the often used, non-smooth BMS transformations that appear in a gauge-fixed description of the theory.