653 reputation
310
bio website jacobi.luc.edu
location Chicago, IL
age
visits member for 4 years, 3 months
seen May 1 at 20:21

I'm an associate professor of physics at a university in Chicago.


Feb
6
awarded  Revival
Feb
6
answered Boundary term in Einstein-Hilbert action
Feb
6
comment Boundary term in Einstein-Hilbert action
Two points. First, the variation of the GHY term is discussed in detail in this post: physics.stackexchange.com/questions/10606/… Second, the GHY term on its own is enough to render a well-defined boundary value problem, but <i>not</i> a physically interesting variational principle. This requires additional surface terms in the action, discussed by Regge and Teitelboim in the Hamiltonian formulation adsabs.harvard.edu/abs/1974AnPhy..88..286R
Sep
24
awarded  Autobiographer
Aug
21
comment Vasiliev Higher Spin Theory and Supersymmetry
If this is the "Paul" that I think it is, hi and welcome to the site! If it's another Paul, I guess the same applies.
Jul
20
answered Evaluating the Einstein-Hilbert action
May
28
comment Tensor decomposition of $\partial_\mu A_\nu$
The symmetric, traceless part isn't gauge-invariant, so it shouldn't have the same sort of interpretation as the anti-symmetric part.
May
10
answered Using Ampere's Law for a Solenoid
May
9
answered Gauge symmetry for p-forms
Feb
2
awarded  Yearling
Nov
19
answered Symmetry transformation in AdS space
Nov
4
awarded  Nice Answer
Nov
1
answered How does the full string theory potential look?
Jun
30
comment What experiment would disprove string theory?
Downvote for not answering the question.
Apr
14
awarded  Quorum
Feb
2
awarded  Yearling
Jan
21
answered What exactly are we doing when we set $c=1$?
Nov
22
answered What does Friedrichs mean by “Myriotic fields”?
Nov
13
comment Cubic term in gauge theories
I'm not sure why you'd do that. Do you know of some way of building a sensible F^3 theory?
Nov
12
awarded  Commentator