"Spherically Symmetric Kerr-Schild Metrics and the Classical Double Copy," by Alec Ridgway (Caltech)

Tuesday, January 12, 2016 - 4:00pm to 5:00pm
TEP Seminars

TEP Seminar

Physics and Astronomy Building (PAB) Room 4-330
Tuesday, January 12, 2016
4-5 PM

Guest Speaker: Alec Ridgway​ (Caltech)

Talk Title: “Spherically Symmetric Kerr-Schild Metrics and the Classical Double Copy”


In the last 20 years the amplitudes program has had success at revealing hidden structures in perturbative gauge theories that are not obvious in a local Lagrangian formulation.  One notable example is the BCJ duality and perturbative double copy, which states that the n-point graviton amplitude can be derived from the n-point Yang-Mills one.  A natural question to ask is does this perturbative duality manifest itself in other aspects of the theories?  Recent work suggests the classical solutions of Gravity and Electromagnetism exhibit similar double copy structure.  Specifically, there is a mapping between Kerr-Schild metrics and E&M vector potentials that is reminiscent of the perturbative double copy.  I will review this “Classical Double Copy”, extend it to the class of spherically symmetric systems and relate the sources on either side of the double copy.  I will also show that the double copies of spherically symmetric charge distributions do not always satisfy the energy conditions.

Event Attachments: 
PAB 4-330