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