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Null infinity from quasi-local phase space

I will consider the phase space at null-infinity from the r\rightarrow\infty limit of a quasi-local phase space for a finite box with a boundary that is null. This box will serve as a natural IR regulator. To remove the IR regulator, I will consider a double null foliation together with an adapted Newman--Penrose null tetrad. The limit to null infinity (on phase space) is obtained in the limit where the boundary is sent to infinity. I will introduce various charges and explain the role of the corresponding balance laws. The talk is based on the paper: arXiv:2012.01889.

 

COVID-19 information for PI Residents and Visitors

Collection/Series: 
Event Type: 
Seminar
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Event Date: 
Thursday, March 18, 2021 - 14:30 to 16:00
Location: 
Other