During the semester we have a high energy seminar and a lunch seminar. In addition to these two seminars we participate in a joint theoretical high energy theory seminar in Newe Shalom. The joint seminar takes place on Tuesdays from 10:30 until 13:30 and includes two talks and lunch. This seminar is attended by the high energy groups of all the Israeli institutions and usually attracts a crowd of roughly twenty participants.

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` ` Sun Mon Tue Wed Thu Fri Sat Shota komatsu 4:00 pm Shota komatsu Oct 6 @ 4:00 pm – 5:00 pm Title: Landau diagrams in AdS and S-matrices from conformal correlators Abstract: Quantum field theories in AdS generate conformalcorrelation functions on the boundary, and in the limit where AdS is nearly flat one should be able … Lorenzo di Pietro 11:30 am Lorenzo di Pietro Oct 13 @ 11:30 am – 12:30 pm Title: Boundary conditions for a free scalar field Abstract: In the first part of the talk, I will consider the problem of classifying the conformal boundary conditions (b.c.) for the free scalar CFT. We will … Rob Myers 4:00 pm Rob Myers Oct 20 @ 4:00 pm – 5:00 pm Title: Quantum Extremal Islands Made EasyAbstract: We illustrate the appearance of quantum extremal islands in holographic setups in higher dimensions. We emphasize the close parallel with the behaviour of holographic entanglement entropy in more familiar … Pedro Vieira 4:00 pm Pedro Vieira Oct 27 @ 4:00 pm – 5:00 pm Title : Multi-point Bootstrap (and the search for a single open/closed string description of N=4 SYM)

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Abstract: We illustrate the appearance of quantum extremal islands in holographic setups in higher dimensions. We emphasize the close parallel with the behaviour of holographic entanglement entropy in more familiar settings.

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Title : Multi-point Bootstrap (and the search for a single open/closed string description of N=4 SYM)

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Title: The Unreasonable Effectiveness of Higher-Derivative Supergravity in AdS_4 Holography

Abstract: I will describe the four-derivative corrections to four-dimensional N=2 minimal gauged supergravity and show that they are controlled by two constants. Interestingly, the solutions of the equations of motion in the two-derivative theory are not modified by the higher-derivative corrections. I will use this to arrive at a general formula for the regularized on-shell action for any asymptotically locally AdS_4 solution of the theory and show how the higher-derivative corrections affect black hole thermodynamic quantities in a universal way. I will employ these results in the context of holography to derive new explicit results for the subleading corrections in the large N expansion of supersymmetric partition functions on various compact manifolds for a large class of three-dimensional SCFTs arising from M2- and M5-branes. I will also briefly discuss possible extensions and generalizations of these results.

ayarom@technion.ac.il is inviting you to a scheduled Zoom meeting.

Topic: Bar’s journal club

Time: Nov 15, 2020 02:30 PM Jerusalem

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https://technion.zoom.us/j/99099738727

Meeting ID: 990 9973 8727

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Meeting ID: 990 9973 8727

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Title: Fine probes of quantum chaos

Abstract: Quantum chaotic dynamics is associated to diverse physical phenomena and signatures. In this talk, we describe progress in building effective theories for three of these: the butterfly effect, the pole skipping phenomenon, and thermalization through the lens of entanglement entropy. We uncover their interplay by showing that the butterfly velocity plays an important role in all three manifestations of chaos. The discussion is informed by results from AdS/CFT and from models of SYK type.

ayarom@technion.ac.il is inviting you to a scheduled Zoom meeting.

Topic: Anton’s talk

Time: Nov 22, 2020 02:30 PM Jerusalem

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https://technion.zoom.us/j/96411533871

Meeting ID: 964 1153 3871

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+972553301762,,96411533871# Israel

+97239786688,,96411533871# Israel

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+972 55 330 1762 Israel

+972 3 978 6688 Israel

Meeting ID: 964 1153 3871

Find your local number: https://technion.zoom.us/u/aggbKmz7h

Title: Gravity from Averaging CFTs

Abstract: I will explore the idea that certain theories of gravity in Anti-de

Sitter space are dual to an average over an ensemble of quantum

theories, rather than to a specific quantum theory. I will describe

an average over Narain’s family of two-dimensional conformal field

theories which describe free bosons on a torus, and compute the

partition function using the Siegel-Weil formula. The result takes

the form of a sum over geometries as one would expect in a theory of

gravity. But the gravitational theory looks more like a Chern-Simons

theory than like Einstein gravity.