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Quantum Matter/QFT/Condensed Matter/Math CMSA seminar - Shared screen with speaker view
Chinmay Mishra
01:04:14
Are there slides we should be seeing?
lsneto
01:04:27
Not yet
Theo Johnson-Freyd
01:15:15
The bird sounds are lovely.
jeff harvey
01:15:26
Yes, keep the birds
Денис Кузнеделев
01:15:51
Birds as boundary condition
jeff harvey
01:38:42
What is the inner product for this lattice?
Hank Chen
01:39:29
R is braiding the boundary quasiparticles/charges right?
Davide Gaiotto
01:39:52
Are there as many preserved U(1)’s as Dirac fermions?
Hank Chen
01:40:44
Ok
jeff harvey
01:44:29
Presumably that formalism is very similar to the formalism for the Narain lattice in toiroidal string compactification.
Gregory Moore
01:48:09
Whenever you have an RCFT the Cardy states for representation j have g_{AF} = S_{0j}/S_{00}
Gregory Moore
01:48:26
I think that should give David's \sqrt{Vol(Fund)}
Gregory Moore
01:49:13
Correction: S_{0j}/\sqrt{S_{00}}
ruben
01:51:13
Can we reinterpret this last formula (the one in Z or sqrt(2)*Z) in the CMT context as measuring the difference of the topological invariant between the gapped boundary regions on the left and on the right?
ruben
01:51:46
thank you
Gregory Moore
02:07:31
Are these results related to the gravitational anomaly for the partition function ( theta functions -> 8th roots of unity)?
Gregory Moore
02:07:50
yes
Gregory Moore
02:08:02
but also more simply from the partition function
Davide Gaiotto
02:11:47
I guess you could have ’t Hooft lines which break rotation symmetry
Davide Gaiotto
02:11:51
To a Cartan
Davide Gaiotto
02:12:11
Using the U(1) x U(1) result
Davide Gaiotto
02:12:54
You can preserve extra U(1)’s which do not extend to the full 4d setup
Inana Mikhlif
02:13:28
will the slides be available online?
Zhijun (George) Qiao
02:14:07
The R-matrix you talked about is the same as the one in Yang-Baxter theory?
Zhijun (George) Qiao
02:14:55
the equation you mentioned is integrable?
Zhijun (George) Qiao
02:15:06
thank you
Davide Gaiotto
02:15:22
Once you have a boundary condition which breaks the symmetry, you can couple it to a 1d sigma model with target a sphere, and then flow to the IR
Pushkar Shrivastava
02:15:23
Thank u
Davide Gaiotto
02:15:48
The result should preserve the full rotation symmetry
jeff harvey
02:16:52
Have you looked at Aut(R)
Robert Stanton
02:16:55
Thank you!
Neil Stringer
02:16:59
Perhaps a previous assumption made to answer this question was incorrect? I would not know where however
jeff harvey
02:17:16
Aut(\Lambda) I mean