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  • 11 votes cast
Feb
13
comment Timelike Shell Collapsing into a Black Hole
I think you're right, and that the EOM for $R$ becomes the geodesic equation for the particles on the shell in the limit where the rest mass of the shell goes to zero.
Feb
12
revised Timelike Shell Collapsing into a Black Hole
added 105 characters in body
Feb
12
revised Timelike Shell Collapsing into a Black Hole
added 238 characters in body
Feb
12
revised Timelike Shell Collapsing into a Black Hole
added 75 characters in body
Feb
12
awarded  Custodian
Feb
12
reviewed Approve Timelike Shell Collapsing into a Black Hole
Feb
12
asked Timelike Shell Collapsing into a Black Hole
Feb
5
awarded  Revival
Feb
4
answered What exactly is regularization in QFT?
Jan
30
awarded  Critic
Jan
30
comment Do primary fields (in a CFT) satisfy the wave equation?
I was the original downvoter, because I thought you were saying that an operator with weight $(h,0)$ doesn't satisfy the wave equation (your answer suggests that $(0,0)$ is the only possibility). I removed my downvote because I understand that wasn't your intention.
Jan
30
comment Do primary fields (in a CFT) satisfy the wave equation?
JP gets kind of lax in volume 2 with the normal ordering notation, and I took that as permission to do the same.
Jan
30
comment Do primary fields (in a CFT) satisfy the wave equation?
Sure, that's fine.
Jan
29
answered Do primary fields (in a CFT) satisfy the wave equation?
Dec
29
answered Can a wormhole be created in space?
Dec
26
answered 3-point correlation function for a massive scalar field
Dec
25
comment S-Matrix in $\mathcal{N}=4$ Super-Yang Mills
From what I understand, the S-matrix for $N=4$ is IR-divergent, as expected for any CFT, but there are some terms in it that are IR-finite and can be unambiguously computed. I would elaborate but that's where my "knowledge" ends.
Dec
23
comment Normalizability of the Hartle-Hawking state in Liouville theory
Hi Trimok, I agree that $<W(\ell_1)W(\ell_2)\rangle$ is the propagator in the "string field theory," but I think it also has an interpretation as the Hartle Hawking wavefunction on the worldsheet. This is easy to see from its definition (3.86). If we insert $W(\ell)$ into the path integral then we are creating a curve on the boundary with length $\ell$, so the path integral $\langle W(\ell_1)W(\ell_2)\rangle$ just computes the integral over all manifolds whose boundary is two circles of length $\ell_1,\ell_2$. This is $\Psi_{\text{HH}}(\ell_1,\ell_2)$ by definition.
Dec
23
asked Normalizability of the Hartle-Hawking state in Liouville theory
Nov
22
accepted Counting D0-D4 Bound States