Description
Nov 9–13
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Yui Hayashi (UTokyo)11/9/26, 10:00 AM
The mechanism of confinement is conventionally understood through the proliferation of monopoles or center vortices. We propose gauge-invariant criteria for center-vortex and monopole condensations using the $\mathbb{Z}_N$ 1-form symmetry twisted partition functions. Based on this formulation, we show that center-vortex condensation requires monopole condensation in gapped systems with...
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Emily Nardoni (Vassar College)11/9/26, 11:30 AM
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11/9/26, 2:00 PM
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11/9/26, 3:30 PM
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Prof. Yannick Meurice (University of Iowa)11/10/26, 10:00 AM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
We discuss recent applications of the Tensor Renormalization Group (TRG) for lattice field theory: 1) relation between zeros of the partition function and spectral gaps, 2) quantum engineering of plaquette interactions, and 3) phase shifts and resonances in real-time calculations.
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Shinichiro Akiyama (University of Tsukuba)11/10/26, 11:30 AM
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11/10/26, 2:00 PM
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11/10/26, 3:30 PM
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Mendel Nguyen (Durham University)11/11/26, 10:00 AM
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Jing-Yuan Chen (Institute for Advanced Study Tsinghua University)11/11/26, 11:30 AM
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11/11/26, 2:00 PM
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11/11/26, 3:30 PM
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Etsuko Itou (YITP, Kyoto University)11/12/26, 9:20 AM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
We investigate the entanglement structure of the 2+1-dimensional Z_2 lattice gauge theory using tensor-network methods. We construct gauge-invariant ground state based on the gauged Gaussian PEPS (GGPEPS) ansatz proposed by Zohar et al., which automatically satisfies Gauss’ law. This ansatz enables us to study the theory over a wide range of coupling constants while keeping gauge invariance...
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Kohei Fujikura (YITP)11/12/26, 9:45 AM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
We study cold dense single-flavor $SU(N_c)$ gauge theory in (1+1) dimensions in the thermodynamic limit using a gauge-invariant variational uniform matrix product state ansatz. This formulation provides a sign-problem-free, first-principles approach to dense QCD. We show that, at finite baryon density with $N_c=2$, the infrared behavior is consistent with a Tomonaga--Luttinger liquid: the...
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Ho Hsiao (Center for Computational Sciences, University of Tsukuba)11/12/26, 10:10 AM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
Gauge fixing is an essential step in lattice QCD calculations, particularly for the study of gauge-dependent observables. Traditional iterative gauge-fixing algorithms are computationally expensive and can suffer from critical slowing down near fixed points, leading to increasing computational costs on large lattices. We present a machine-learning framework for lattice gauge fixing, in which...
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Soma Onoda (Kyushu University)11/12/26, 10:35 AM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
A central challenge in formulating chiral gauge theories on the lattice is to realize the anomaly-cancellation mechanism at finite lattice spacing. In this talk, I present a bosonization-based lattice formulation of two-dimensional non-Abelian chiral gauge theories.
In the continuum description based on non-Abelian bosonization, the gauge anomaly of chiral fermions is encoded through...
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Tsubasa Sugeno (Tohoku University)11/12/26, 11:30 AM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
Dualities between two-dimensional supersymmetric gauge theories can be obtained by compactifying dual four-dimensional theories on $S^2$. In this talk, we discuss how the statements of these dualities can be refined by taking into account the global structure of the gauge groups. In particular, we focus on the Intriligator–Seiberg duality between supersymmetric QCDs with SO and Spin gauge groups.
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Nagare Katayama (YITP)11/12/26, 11:55 AM
Understanding the microscopic origin of confinement and the other gapped phases in four-dimensional Yang–Mills theory remains a central challenge. The Wilson–’t Hooft classification constrains these phases through the behavior of electric and magnetic line operators. The Cardy–Rabinovici model provides an Abelian setting in which to study confinement, oblique confinement, and duality. In our...
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Shota Saito (Kavli IPMU)11/12/26, 1:50 PM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
We study SUSY gauge theories exhibiting true confinement after introducing anomaly mediated SUSY breaking (AMSB), focusing on the resulting vacuum structure and symmetry breaking as the theories become non-SUSY. The UV insensitivity of AMSB allows us to use known low energy effective theories even in strongly coupled regimes. We analyze several examples and find that vacuum branches with an...
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Fathiyya Izzatun Az Zahra (YITP)11/12/26, 2:15 PM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
The study of two- and three-particle states interaction is important for hadron physics. Lattice QCD provides a non-perturbative framework for investigating strongly interacting quantum field theories and can be used to study the two- and three-particle states numerically, where Monte Carlo (MC) method is the standard approach employed for the simulations. Despite of its success, MC method has...
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Sho Araki (Osaka university)11/12/26, 2:40 PM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
Symmetric mass generation (SMG) is a mechanism for opening a gap without spontaneous symmetry breaking, first demonstrated by Fidkowski and Kitaev in a one-dimensional Majorana-chain model. We formulate the model as a Euclidean path integral on a two-dimensional lattice, with and without domain walls. Our numerical results show that four-fermion interactions can gap out the Majorana mode...
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Hiromasa Watanabe (Keio University)11/12/26, 3:05 PM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
Gradient flow provides a practical framework for defining and investigating gauge topology on the lattice. At finite lattice spacing, however, flow at large flow time may cause topological objects to shrink and eventually disappear, altering the identification of topological sectors. We present a systematic study of long-time gradient flow in $SU(2)$ and $SU(3)$ Yang–Mills theories, comparing...
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Mr Genki Yoshimura (The University of Osaka, Graduate School of Physics)11/12/26, 4:00 PM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
Axion electrodynamics in vacuum exhibits rich generalized global symmetries, including higher-form symmetries, higher-group structures, and non-invertible symmetries. However, a universal description of real-time dynamics of axion electrodynamics has not been established, and generalized symmetries in this nonequilibrium regime remain poorly understood.
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We construct a nonequilibrium effective... -
Alvaro Pastor Gutierrez (RIKEN iTHEMS)11/12/26, 4:25 PM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
Dynamical symmetry breaking plays a crucial role in mass and scale
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generation. In QCD-like theories, its dependence on the number of
fermion flavours determines the phase structure and the transition to
the conformal regime. In this work, we employ the functional
renormalisation group and the generalised flow equation to compute
non-perturbative corrections, including momentum... -
Shoto Aoki (RIKEN iTHEMS)11/12/26, 4:50 PM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
We study the duality of lattice Maxwell theory in the modified Villain formulation, employing an ultra-local action with a theta term. Although this action is known to become non ultra-local through the Poisson resummation formula, we show that this non ultra-locality can be removed by incorporating a non-local transformation procedure into the definition of the S-transformation. As a result,...
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Akihiro Shibata (Computing Reserch Center, KEK)11/12/26, 5:15 PM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
The dual superconductor picture is a promising mechanism for quark confinement, and magnetic monopoles play a dominant role in quark confinement. To understand the mechanism of quark confinement, we investigate the relationship among the violation of the non-Abelian Bianchi identity (VNABI), the emergence of magnetic monopoles, and quark confinement by using the gauge-covariant decomposition...
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11/12/26, 6:00 PM
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Jinfeng Liao (Indiana University Bloomington)11/13/26, 10:00 AM(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics
Emergent topological objects are known to play a fundamental role in the QCD nonperturbative phenomena such as confinement and chiral symmetry breaking. Examples include the family of instantons (vacuum instantons, calorons at finite temperature, as well as instantons with nontrivial holonomy), the sphalerons, and the chromo-magnetic monopoles. This talk will focus on discussing possible...
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Xiaojun Yao (University of Washington)11/13/26, 11:30 AM
Quantum simulation of lattice gauge theory has attracted a lot of interest recently. A widely studied Hamiltonian setup for lattice gauge theory is the Kogut-Susskind Hamiltonian, which is constructed in temporal gauge. As a consequence of this gauge choice, Gauss's law has to be imposed. Despite of great progress in designing quantum algorithms for the Kogut-Susskind Hamiltonian, of which I...
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11/13/26, 2:00 PM
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11/13/26, 3:30 PM