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Quantum Fields and Strings Group Journal Club and Seminar
Quantum Fields and Strings Group Journal Club and Seminar
String Dualities and Compact Stars
String Dualities and Compact Stars
Organizer
Speaker
Kilar Zhang
Time
Thursday, November 7, 2024 2:50 PM - 4:20 PM
Venue
A3-4-101
Online
Zoom 462 110 5973
(BIMSA)
Abstract
We will give a brief report on the recent progress concerning the proof of AGT conjecture, the SW/QNM correspondence for black holes, and holographic QCD for neutron stars.
AGT conjecture reveals a connection between 4D gauge theory and 2D conformal field theory, and can be generalized to higher Dimensions. We give the proofs of 4D and 5D AGT conjecture at beta=1. In the 5D case, a q-deformed Selberg average formula of Schur polynomials is proposed and proved to complete the proof.
The newly established Seiberg-Witten (SW)/Quasinormal Modes (QNM) correspondence offers an efficient analytical approach to calculate the QNM frequencies, which was only available numerically before. We find that a similar duality exists between Seiberg-Witten theory and black hole superradiance. We also study the quasinormal modes (QNM) of the charged C-metric.
A theoretical equation of state for neutron stars with only one parameter is derived from Witten-Sakai-Sugimoto model, as an application of AdS/QCD, where pointlike instanton case is taken into consideration. Now we upgrade this model to instanton gas, with one more variable, the instanton width. This is not naively a free parameter, but a function of the chemical potential.
AGT conjecture reveals a connection between 4D gauge theory and 2D conformal field theory, and can be generalized to higher Dimensions. We give the proofs of 4D and 5D AGT conjecture at beta=1. In the 5D case, a q-deformed Selberg average formula of Schur polynomials is proposed and proved to complete the proof.
The newly established Seiberg-Witten (SW)/Quasinormal Modes (QNM) correspondence offers an efficient analytical approach to calculate the QNM frequencies, which was only available numerically before. We find that a similar duality exists between Seiberg-Witten theory and black hole superradiance. We also study the quasinormal modes (QNM) of the charged C-metric.
A theoretical equation of state for neutron stars with only one parameter is derived from Witten-Sakai-Sugimoto model, as an application of AdS/QCD, where pointlike instanton case is taken into consideration. Now we upgrade this model to instanton gas, with one more variable, the instanton width. This is not naively a free parameter, but a function of the chemical potential.