2025年丘成桐中心理论物理研讨会
We organize theoretical physics seminars regularly. The seminars are broadcasted online mostly by Zoom (sometimes in other methods). Interested people are free to join without registration in advance.
The Zoom info is
URL: https://us02web.zoom.us/j/3854420225?pwd=SXY4eWJKOTBFZWJDaE16aXpTamY1QT09
Meeting ID: 385 442 0225
Passcode: yauc
and China Standard Time (UTC+8) is used.
If you wish to give a talk, please write to any one of the faculty members. For other workshops, contact the organizers for the details.
Seminar information can also be found on the website of our Theoretical Physics Group at YCSEU. Events (yaucseu.github.io)
Upcoming Seminars in 2025
Date | Name | Title |
7th March, 2025 Friday, 16:00-17:00 | Kazumi Okuyama (Shinshu University) | TBA |
Abstract TBA | ||
10th March, 2025 Monday, 16:00-17:00 (Offline) | René Meyer (Julius-Maximilians-Universität Würzburg) | Symmetry-Resolved Entanglement in AdS & BCFT |
Abstract I will discuss recent new examples providing new links between quantum information, holography and quantum gravity. I will first introduce a refinement of the usual entanglement entropy for theories with global conserved charges, the so-called symmetry resolved entanglement entropy, and discuss its implementation in AdS3/CFT2 (2012.11274, 2108.09210). I will in particular discuss the structure of entanglement in different charge sectors, which turns out trivial in theories with U(1) Kac-Moody symmetry. This property is called equipartition of entanglement. I will then discuss how W3 symmetric CFTs (2202.11111) break this equipartition property. Finally, I will present recent work (2212.09767) which employs boundary conformal field theory techniques to obtain exact results for the symmetry-resolved entanglement and in particular for the equipartition property in U(1) Kac-Moody symmetric CFTs. | ||
14th March, 2025 Friday, 10:00-11:00 | Rafael Nepomechie (University of Miami) | Quantum state preparation: from Dicke states to Bethe states |
Abstract The spin-1/2 Heisenberg quantum spin chain is a paradigmatic model of theoretical physics. We consider the problem of preparing exact eigenstates of this model on a quantum computer. We begin, after briefly reviewing the basics of quantum computing, by considering the simpler problem of preparing Dicke states, whose solution we then generalize to Bethe states. We use the latter construction to estimate Bethe roots. | ||
21st March, 2025 Friday, 16:00-17:00 | Rong-xin Miao (Sun Yat-sen University) | TBA |
Abstract TBA | ||
28th March, 2025 Friday, 16:00-17:00 | Yixu Wang (Tsinghua University) | TBA |
Abstract TBA | ||
11th April, 2025 Friday, 16:00-17:00 | Tomas Reis (CERN) | TBA |
Abstract TBA | ||
18th April, 2025 Friday, 16:00-17:00 | Jin Chen （Xiamen University） | TBA |
Abstract TBA | ||
30th May, 2025 Friday, 16:00-17:00 | Li-Ming Cao (USTC) | TBA |
Abstract TBA | ||
Past Seminars in 2025
Date | Name | Title |
17th January, 2025 16:00-17:00 | Marco Serone (SISSA) | Exploring Confinement in Anti-de Sitter Space |
Abstract The study of non-abelian gauge theories in compact or non-flat spaces can be useful to gather insights and new perspectives on the confinement problem. We consider Yang-Mills theory on four dimensional Anti-de Sitter space and wonder how signals of confinement in the bulk can be detected from boundary observables. The Dirichlet boundary condition cannot exist at arbitrarily large radius because it would give rise to colored asymptotic states in flat space and hence a deconfinement-confinement transition has to occur as the radius is increased. By perturbative computations we provide evidence for the scenario of merger and annihilation. Namely, the theory with Dirichlet boundary condition stops existing because it merges and annihilates with another theory. We also derive a general result for the leading-order anomalous dimension of the so called displacement operator for a generic perturbation in Anti-de Sitter, showing that it is related to the beta function of bulk couplings. | ||
10th January, 2025 16:00-17:00 | Christoph Uhlemann （Vrije Universiteit Brussel） | Exploring doubly-holographic BCFTs |
Abstract I will discuss recent work on N=4 super-Yang-Mills theory with Gaiotto-Witten boundary conditions. This broad class of theories with rich boundary dynamics comprises the most supersymmetric boundary conformal field theories in four dimensions, and in the context of string theory it allows for a proper realization of double holography. We will discuss their holographic description, a tight interplay between the holographic duals and the matrix models arising from supersymmetric localization, defect one-point functions, and large-charge operators. | ||
3th January, 2025 16:00-17:00 | Ideal Majtara （SISSA） | Partition function of gauge theories on the blowup and non-perturbative topological strings |
Abstract The low-energy theory of 4d N=2 supersymmetric gauge theories is encoded in the Seiberg-Witten (SW) curve which is naturally related to an integrable system. For SU(2) gauge theories, in presence of Omega-background this integrable system is given by Painlevé equations. In this talk we will show that the Nekrasov partition functions of 4d SU(2) susy gauge theories on the blowup of spacetime are tau functions which solve the Painlevé equations in Hirota bilinear form. These solutions can be expressed as expansions in terms of the moduli of the quantum SW curve and the construction can be applied also to non-Lagrangian theories. Furthermore, these solutions have manifest modular properties which provide a natural non-perturbative completion of the corresponding topological string partition function and they directly lead to the BCOV holomorphic anomaly equations of the topological string. | ||
Past Seminars in 2024
Please refer to the following webpage:
Shing-Tung Yau Center Theoretical Physics Seminars in 2024
Past Seminars in 2023
Please refer to the following webpage:
Shing-Tung Yau Center Theoretical Physics Seminars in 2023
Past Seminars in 2022
Please refer to the following webpage:
Shing-Tung Yau Center Theoretical Physics Seminars in 2022