[Theory-seminars] Cake seminar this Wednesday - Carl Carlson

[Adam Freese]

Greetings everyone,

This Wednesday, February 4 at 1 pm ET we will have a Cake Seminar by Carl Calrson from the College of William & Mary. The seminar will take place in CC L102.

There is a possibility of snow this coming Wednesday, and if the lab is closed, then the seminar will be postponed to a later date. For now, however, the seminar is tentatively scheduled for Wednesday under the assumption that the lab will remain open.

Please find the title and abstract below.

TITLE
Musings on the Energy-Momentum Tensor

ABTRACT
The well-known Noether procedure leads to a canonical energy-momentum tensor that is not, except for scalar particles, symmetric in its two indices.  It can be symmetrized by a procedure due to Rosenfeld and Belinfante, and this can be extremely desirable when one uses the energy-momentum tensor as the source for the Einstein equation in General Relativity.  We will review, in this seminar, the steps that give the canonical and Rosenfeld-Belinfante tensors,  show that starting from the Lorentz force law, the force on a small dielectric particle agrees with the canonical energy-momentum tensor and not with the symmetric version,  show some other places where the distinction between the two forms of the tensor matters, and comment on some published works that seem to obtain a symmetric energy-momentum tensor from the Noether procedure.

We look forward to your presence at the seminar.

Kind regards,
Adam
(on behalf of the organizing committee: Adam, Joe and Pia)

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