The complexified supertranslation charge acts as time translation on one radiative mode and as supertranslation on the other, implying a new soft NUT/graviton theorem.
New conservation laws for ze ro rest-mass fields in asymptotically flat space-time,
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Dual gravitational charges and soft theorems
The complexified supertranslation charge acts as time translation on one radiative mode and as supertranslation on the other, implying a new soft NUT/graviton theorem.