Triangle Seminars
Wednesday, 3 Jun 2020
Spherical Branes, Supersymmetric Localization, and Holography
Nikolay Bobev
(KUL Leuven)
Abstract:
I will describe a class of supergravity solutions holographically dual to d-dimensional maximally supersymmetric SYM on S^d. Supersymmetric localization can be employed to calculate the partition function and the VEV of a 1/2-BPS Wilson lines in the planar limit of the SYM theory. I will present the results of this calculation and will show how they lead to a non-trivial precision test of holography in the context of non-conformal QFTs and space-times that are non asymptotically locally AdS.
I will describe a class of supergravity solutions holographically dual to d-dimensional maximally supersymmetric SYM on S^d. Supersymmetric localization can be employed to calculate the partition function and the VEV of a 1/2-BPS Wilson lines in the planar limit of the SYM theory. I will present the results of this calculation and will show how they lead to a non-trivial precision test of holography in the context of non-conformal QFTs and space-times that are non asymptotically locally AdS.
Posted by: IC
From bulk reconstruction to Berry phases and back
Bartlomiej Czech
(IAS, Tsinghua U.)
Abstract:
The first half of the talk will be a review of the main ingredients of bulk reconstruction: the Ryu-Takayanagi formula and subregion duality, the JLMS theorem, error correction and the complexity conjecture. The second half will be about my recent and current work on "modular Berry phases"–a type of Berry phase which characterizes the entanglement structure of a quantum state. We will see that the bulk curvature in AdS is (up to an integral transform) a special case of the modular Berry phase, though the concept has many other applications which we may or may not discuss.
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Part of the Black Hole Information Paradox Journal Club. Please email <a href="mailto:damian.galante@kcl.ac.uk">damian.galante@kcl.ac.uk</a> for Zoom link to the meeting.
The first half of the talk will be a review of the main ingredients of bulk reconstruction: the Ryu-Takayanagi formula and subregion duality, the JLMS theorem, error correction and the complexity conjecture. The second half will be about my recent and current work on "modular Berry phases"–a type of Berry phase which characterizes the entanglement structure of a quantum state. We will see that the bulk curvature in AdS is (up to an integral transform) a special case of the modular Berry phase, though the concept has many other applications which we may or may not discuss.
<p>
</p>
Part of the Black Hole Information Paradox Journal Club. Please email <a href="mailto:damian.galante@kcl.ac.uk">damian.galante@kcl.ac.uk</a> for Zoom link to the meeting.
Posted by: andrea
Thursday, 4 Jun 2020
Crossing equations for mixed flux AdS3/CFT2 (UNUSUAL TIME)
Olof Ohlsson Sax
(NORDITA)
Abstract:
I will give an overview of recent progress in understanding string theory in AdS3 backgrounds with a mixture of Ramond-Ramond and Neveu-Schwarz-Neveu-Schwarz three-form flux. Such theories are integrable, but provide many features not encountered in the more familiar case of pure Ramond-Ramond flux. In this talk I will explore the analytic structure of the dispersion relation of the world-sheet excitations and how it relates to the crossing equations of the two-particle S matrix. Determining the dressing phases of the mixed flux S matrix is the next major step in using integrability to the AdS3/CFT2 correspondence.
–––– Part of London Integrability Journal Club. New participants please register at integrability-london.weebly.com to receive the link.
I will give an overview of recent progress in understanding string theory in AdS3 backgrounds with a mixture of Ramond-Ramond and Neveu-Schwarz-Neveu-Schwarz three-form flux. Such theories are integrable, but provide many features not encountered in the more familiar case of pure Ramond-Ramond flux. In this talk I will explore the analytic structure of the dispersion relation of the world-sheet excitations and how it relates to the crossing equations of the two-particle S matrix. Determining the dressing phases of the mixed flux S matrix is the next major step in using integrability to the AdS3/CFT2 correspondence.
–––– Part of London Integrability Journal Club. New participants please register at integrability-london.weebly.com to receive the link.
Posted by: andrea