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10/27/25, 8:30 AM
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10/27/25, 9:20 AM
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11/4/25, 10:50 AM
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11/4/25, 11:00 AM
The textbook approach to quantum field theory is to start from
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the Lagrangian and then either do perturbation theory or, if the theory
is strongly coupled, resort to lattice Monte Carlo simulations. Recently
there has been renewed interest in developing and applying “bootstrap
methods”, which have different spirit. They use nonperturbatively valid
“axioms” to obtain concrete numerical... -
11/4/25, 2:30 PM
Yang-Mills theory in AdS_4 with Dirichlet boundary conditions is expected to undergo a deconfinement-confinement transition as the AdS radius varies, as the global symmetry of the boundary CFT cannot hold in flat space. We apply the conformal bootstrap to four-point functions of non-abelian conserved currents in 3d to place bounds on proposed mechanisms for the transition. We rule out the...
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11/4/25, 3:30 PM
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11/5/25, 11:00 AM
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11/5/25, 2:00 PM
We study the $N=3$ case of the $NCCP^{N-1}$ model, which is a field theory of $N$ complex scalars in 3d coupled to an Abelian gauge field with $SU(N)\times U(1)$ global symmetry. Recent evidence suggests the $N=2$ theory is not critical, which makes the $N=3$ theory the simplest possibility of deconfined quantum criticality. We apply the conformal bootstrap to correlators of charge $q=0,1,2$...
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11/5/25, 2:30 PM
Yang-Lee criticality is the simplest non-Hermitian conformal field theory. The model was first reported as a phase transition of Ising model in imaginary longitudinal magnetic field more than half a centry ago. Since then, many qualitative and quantitative properties of YL criticality have been studied, remarkably, including the fact that the model can be described in Landau-Ginzburg scheme...
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11/5/25, 3:30 PM
Stanislav Filatov "Geometry of Two-Qubit Entanglement on Two Bloch Spheres"
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Yuma Furuta "On the quadratic equations for detecting duality symmetries of compact boson CFTs"
Samuel Laliberte "Quantum mechanics bootstrap and supersymmetry"
Yuefeng Liu "Bootstrap about new crosscap states and non-invertible symmetry"
Souparna Nath "Complexity Growth, Krylov-Wigner function and... -
11/6/25, 11:00 AM
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11/6/25, 2:00 PM
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11/6/25, 2:30 PM
I will discuss quantum field theories (QFTs) on hyperbolic surface (i.e. Euclidean AdS2) with a conformal boundary condition. Correlation functions of local operators in such QFTs can be fully characterized by the QFT data: (1) scaling dimensions of boundary operators, (2) boundary operator product expansion (OPE) coefficients, and (3) boundary operator expansion (BOE) coefficients for bulk...
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11/6/25, 3:30 PM
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11/7/25, 2:00 PM
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11/7/25, 2:30 PM
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11/7/25, 3:00 PM
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11/10/25, 11:00 AM
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11/10/25, 2:00 PM
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11/10/25, 3:30 PM
Abstract: In a unitary 2D modular invariant CFT, the high-energy density of states is universal and follows the famous Cardy formula, the precise version of which requires an averaging over an order-one window. In non-rational 2D CFTs, an extended version of the Cardy formula exists for the density of states with finite twist and large spin. In this talk, we will answer in which sense this...
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11/11/25, 9:30 AM
Recently, a close parallel emerged between conformal field theory in general dimension and the theory of automorphic forms. I will review this connection and explain how it can be leveraged to make rigorous progress on central open problems of number theory, using methods borrowed from the conformal bootstrap. In particular, I will use the crossing equation to prove new subconvex bounds on...
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11/11/25, 11:00 AM
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11/11/25, 2:00 PM
Axiomatic quantum field theory is a mathematically rigorous formulation of quantum field theory proposed in the 1950s.
Notable frameworks include the Wightman axioms for quantum fields on Minkowski spacetime and the Osterwalder-Schrader axioms, formulated via Schwinger functions on Euclidean spacetime.
In this talk, based on joint work with M. S. Adamo and Y. Tanimoto, we will discuss...
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11/12/25, 9:30 AM
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11/12/25, 11:00 AM
Towards bootstrapping de Sitter correlators
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11/12/25, 2:00 PM
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11/13/25, 9:30 AM
I will discuss recent progress in constraining four-dimensional conformal field theories with Abelian conserved currents using the conformal bootstrap. After setting up the bootstrap problem for the four-point function of U(1) currents, I will present numerical bounds on operator dimensions and on physical quantities such as the ratio between the ’t Hooft anomaly and the current central...
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11/13/25, 11:00 AM
In this talk, I will present a practical realization of the higher-point conformal
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bootstrap, focusing on the five-point comb channel implementation thereof. I
will consider 5-point scalar correlators in d-dimensional conformal field theories
(CFTs). I will begin by laying out a robust algorithm for the efficient numeri-
cal evaluation of conformal blocks for exchanged primary operators of... -
11/13/25, 2:00 PM
The O(N) Non-Linear Sigma Model (NLSM) in d=2+epsilon has long been conjectured to describe the same conformal field theory as the Wilson-Fisher O(N) fixed point obtained from the (phi^2)^2 model in
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d=4-epsilon. In this talk, we put this conjecture into question, building on the recent observation [Jones,2024] that the NLSM CFT possesses a protected operator with dimension N-1, which is... -
11/14/25, 9:30 AM
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11/14/25, 11:00 AM
Accurate boundary bootstrap for the 3d O(N) normal universality class
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11/14/25, 2:00 PM
We consider the simplest class of 3d gauge theories, which is N complex scalar fields coupled to an Abelian gauge field. For large N this theory is known to flow to a CFT with SU(N)xU(1) symmetry, but for finite N there is controversy in the literature. The N=2 case is particularly famous, as its believed to describe the Neel-VBS phase transition, which might be experimentally realizable....
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11/17/25, 9:30 AM
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11/17/25, 11:00 AM
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11/17/25, 2:00 PM
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11/17/25, 3:30 PM
Abstract: Cosmological correlators and the associated wavefunction coefficients serve as a smoking gun towards the physics of inflation at high energy scales. In minimal setups of single-field inflation, wavefunction coefficients are purely real at tree-level due to unitarity, locality and scale invariance, leading to the so-called no-go theorems on parity violation. Such parity-violating...
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11/18/25, 9:30 AM
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11/18/25, 11:00 AM
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11/18/25, 2:00 PM
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11/18/25, 3:30 PM
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11/19/25, 9:30 AM
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11/19/25, 11:00 AM
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11/19/25, 2:00 PM
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11/19/25, 3:30 PM
Abstract: The Gauge Theory Bootstrap computes the strongly coupled pion dynamics by considering the most general scattering matrix, form factors and spectral densities and matching them with perturbative QCD at high energy and with weakly coupled pions at low energy. In this talk (based on https://arxiv.org/abs/2505.19332 with Yifei He, ENS, Paris), we show that further constraints on the...
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11/20/25, 9:30 AM
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11/20/25, 11:00 AM
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11/20/25, 2:00 PM
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11/21/25, 9:30 AM
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11/21/25, 11:00 AM
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11/21/25, 2:00 PM
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11/21/25, 3:30 PM
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11/25/25, 11:00 AM
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11/25/25, 2:00 PM
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11/25/25, 2:30 PM
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11/26/25, 11:00 AM
Abstract: The two-body problem in general relativity can be described — in the post-Minkowskian expansion — purely in terms of on-shell amplitudes and their classical limit, without ever invoking a Lagrangian or equations of motion. However, beyond this perturbative regime, it is not known whether more complex aspects of binary dynamics — such as the merger phase or the influence of event...
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11/26/25, 2:00 PM
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11/26/25, 2:30 PM
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11/26/25, 3:00 PM
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11/26/25, 4:00 PM
Chen-Hsuan Hsu, "Electron-electron and electron-phonon scattering-driven topological phase transitions in helical liquids"
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Damien Leflot,
Facundo Rost ,"The Cosmological Grassmannian"
Guangzhuo Peng, "Running EFT-hedron with null constraints at loop level"
Kamran Salehi Vaziri. "Non-perturbative cosmological bootstrap: A construction of de Sitter late-time boundary"
Mang Hei Gordon Lee,... -
11/27/25, 11:00 AM
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11/27/25, 2:00 PM
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216. Yu Wenqi "On the IR dependence, conformal anomaly and renormalization of de Sitter correlators"11/27/25, 2:30 PM
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11/28/25, 11:00 AM
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11/28/25, 2:00 PM
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