Mathematical Aspects of Scattering Amplitudes Program Dates: April 15 - May 24, 2024 Location: Harvard CMSA, 20 Garden Street, Cambridge, MA 02138 This program will bring together and foster interaction between theoretical physicists and mathematicians working on various topics connected to recent developments in our understanding of scattering amplitudes in quantum field theory. The field […]
The CMSA will be hosting a Workshop on Global Categorical Symmetries from April 29–May 3, 2024. Participation in the workshop is by invitation. The workshop will hold three Symmetry Colloquia open to the community on Thursday, May 2, 2024. Location: Room G-10, CMSA, 20 Garden Street, Cambridge MA 02138 Time: 2:00 - 2:50 pm Speaker: Clay […]
Colloquium Speaker: Lance Dixon (SLAC, Stanford University) Title: The DNA of Particle Scattering Abstract: At the Large Hadron Collider, the copious scattering of quarks and gluons in quantum chromodynamics (QCD) produces Higgs bosons and many backgrounds to searches for new physics. At short distances, scattering in QCD can be evaluated in perturbation theory and leads to highly […]
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Nima Arkani-Hamed, IAS Title: Surfaceology and the Real World Part 1 (Note change of venue to Jefferson 453)
Speaker: Lakshminarayanan Mahadevan Question: What is morphogenesis? (Morphogenesis: geometry and biology)
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Nima Arkani-Hamed, IAS Title: Surfaceology and the Real World Part 2 (Note change of venue to Jefferson 453)
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Jaroslav Trnka, University of California, Davis Title: Loops of loops expansion in the Amplituhedron
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Yu-tin Huang, National Taiwan University Title: Loop in trees: Chambers in amplitudes and correlation functions
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Livia Ferro, University of Hertfordshire Title: Scattering Amplitudes from Null-cone Geometry
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Daniil Rudenko, U Chicago Title: Introduction to Cluster Polylogarithms Location: Harvard Science Center 310
Active Matter Seminar Speaker: Jayson Paulose, University of Oregon Title: Control of parametric amplification in space-time modulated mechanical metamaterials Abstract: Active mechanical metamaterials harbor acoustic signal processing functionalities that are impossible to achieve in passive structures. Amplifying an elastic wave as it passes through the material is a prominent example, with potential applications in acoustic signal […]
Symmetry Colloquia - Global Categorical Symmetries May 2, 2024 Location: Room G-10, CMSA, 20 Garden Street, Cambridge MA 02138 Speaker: Clay Còrdova, University of Chicago Title: Particle-Soliton Degeneracies from Spontaneously Broken Non-Invertible Symmetry Abstract: We study non-invertible topological symmetry operators in massive quantum field theories in (1+1) dimensions. In phases where this symmetry is spontaneously broken […]
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Andrew McLeod, Edinburgh Title: Genealogical Constraints on Feynman Integrals
Colloquium Speaker: Sarah Harrison (Northeastern University) Title: Liouville Theory and Weil-Petersson Geometry Abstract: Two-dimensional conformal field theory is a powerful tool to understand the geometry of surfaces. Liouville conformal field theory in the classical (large central charge) limit encodes the geometry of the moduli space of Riemann surfaces. I describe an efficient algorithm to compute […]
CMSA Member Seminar Speaker: Sergiy Verstyuk Title: On using ML for Economics Abstract: I will introduce some tools from the field of machine learning and discuss how they can be leveraged to get a fresh perspective on economics.
https://youtu.be/zxjuAlzuW78 General Relativity Seminar Speaker: Albert Law, Stanford Title: Real-time observables in horizon thermodynamics Abstract: Euclidean black hole 1-loop determinants have recently been shown to compute a renormalized thermal canonical partition function for free fields in Lorentzian signature. A key ingredient is a 'quasinormal mode (QNM) character', whose Fourier transform equals the renormalized spectral density of the […]
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Jacob Bourjaily, Penn State Title: The Algebraic and Transcendental Structure of Perturbative QFT
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Ruth Britto, Trinity Title: Cuts and Symbols
Algebraic Geometry in String Theory Seminar Speaker: Eric Pichon-Pharabod, Universite Paris-Saclay Title: Computing periods of hypersurfaces and elliptic surfaces via effective homology Abstract: The period matrix of a smooth complex projective variety X encodes the isomorphism between its singular homology and its algebraic De Rham cohomology. Numerical approximations with sufficient precision of the entries of this […]
Quantum Matter in Mathematics and Physics Seminar Speaker: Eslam Khalaf (Harvard) Title: From quantum Hall to Hubbard physics in twisted bilayer graphene Abstract: Early on it was noticed that twisted bilayer graphene (TBG) has elements in common with two paradigmatic examples of strongly correlated physics: Hubbard physics and quantum Hall physics. On the one hand, […]
CMSA Member Seminar Speaker: Robert Moscrop, Harvard CMSA Title: On the landscape of 4d N=2 SCFTs Abstract: Four-dimensional conformal field theories with sufficient (N = 2) supersymmetry are highly constrained. So much so, there has been an ongoing effort to classify them using only information about their moduli space of vacua. In this talk, I will review […]
General Relativity Seminar Speaker: Mikhail Molodyk, Stanford Title: An analogue of non-interacting quantum field theory in Riemannian signature Abstract: Recent advances using microlocal tools have led to constructions, for wave operators on various classes of spacetimes, of four distinguished Fredholm inverses which have the singular behavior required of retarded, advanced, Feynman, and anti-Feynman propagators in QFT. Vasy […]
Quantum Matter in Mathematics and Physics Seminar Speaker: Junyi Zhang, Johns Hopkins University Title: Improving Mean-Field Theory for Quantum Magnets Abstract: Frustrated magnets have garnered significant attention because of their potential to host exotic spin liquids, while many real material candidates exhibit magnetic orders. Due to their proximity to spin liquid phases, the semiclassical descriptions […]
Colloquium Speaker: Madhu Sudan, Harvard University Title: Errors and Correction in Cumulative Knowledge Abstract: Societal accumulation of knowledge is a complex, and arguably error-prone, process. The correctness of new units of knowledge depends not only on the correctness of the new reasoning, but also on the correctness of old units that the new one builds […]
CMSA Member Seminar Speaker: Jue Liu Title: Quasilocal mass for general domains in space Abstract: Diffeomorphism-invariant quasilocal mass in classical general relativity has been studied for decades, but it is still an open problem how to define quasi-local mass for general domains with multiple boundaries in space. Using the Hamiltonian formulation, we will provide a new way […]
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: James Drummond, University of Southampton Title: Multiple light-like Wilson loops in N=4 super Yang-Mills theory
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Matteo Parisi, Harvard CMSA Title: The amplituhedron and cluster algebras
Algebraic Geometry in String Theory Seminar Speaker: Franco Rota, University of Glasgow Title: Mirror symmetry and log del Pezzo surfaces Abstract: The homological mirror symmetry conjecture predicts a duality, expressed in terms of categorical equivalences, between the complex geometry of a variety X (the B side) and the symplectic geometry of its mirror object Y (the A side). Motivated […]
Active Matter Seminar Speaker: Kevin Mitchell, University of California, Merced Title: Controlling chaotic advection in 2D active nematics Abstract: Recent years have seen a surge of interest in active materials, in which energy injected at the microscale gives rise to mesoscale coherent motion. One prominent example is an active 2D "liquid crystal" composed of microtubules in […]
Speaker: Partha Guha, Khalifa University, Abu Dhabi Title: Geometry of Generalized Lienard Equations, Contact Geometry and Metriplectic Structure Abstract: We start with a self-contained brief review of the construction of non-standard Lagrangian and Hamiltonian structures using the Jacobi Last Multiplier for the (generalized) reduced Lienard equations satisfying Chiellini integrability condition, we then explore its connection […]
Quantum Matter in Mathematics and Physics Seminar Speaker: Mikhail Ivanov (MIT) Title: Love and Naturalness Abstract: Recent progress in gravitational wave astronomy has spurred the development of efficient tools to describe gravitational binary dynamics. One such tool is classical worldline effective field theory (EFT). In the first part of my talk, I will show how to […]
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Michael Borinsky, ETH Zurich Title: On the Euler characteristic of the commutative graph complex and the top-weight cohomology of the moduli space of curves
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Chaim Even-Zohar, Technion Title: Amplituhedron tiles and twistor polynomials
Amplituhedra, Cluster Algebras, and Positive Geometry Dates: May 29-31, 2024 Location: Harvard CMSA, 20 Garden Street, Cambridge MA 02138 & via Zoom In recent years, a remarkable paradigm shift has occurred in understanding quantum observables in particle physics and cosmology, revealing their emergence from underlying novel mathematical objects known as positive geometries. The conference will […]