Event Series General Relativity Seminar

Linearised Second Law for Higher Curvature Gravity and Non-Minimally Coupled Vector Fields

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

General Relativity Seminar Speaker: Zihan Yan, Cambridge University Title: Linearised Second Law for Higher Curvature Gravity and Non-Minimally Coupled Vector Fields Abstract: Expanding the work of arXiv:1504.08040, we show that black holes obey a second law for linear perturbations to bifurcate Killing horizons, in any covariant higher curvature gravity coupled to scalar and vector fields. The vector […]

Event Series CMSA Q&A Seminar

CMSA Q&A Seminar 3/5/2024

Common Room, CMSA 20 Garden Street, Cambridge, MA, United States

CMSA Q&A Seminar Speaker: Yannai Gonczarowski, Harvard University Question: What do people mean when they say 'the intersection between theoretical computer science and economic theory'?

Derived categories of genus one curves and torsors over abelian varieties

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

Algebraic Geometry in String Theory Seminar Speaker: Jonathan Rosenberg, University of Maryland Title: Derived categories of genus one curves and torsors over abelian varieties   Abstract:  Studying orientifold string theories on elliptic curves or abelian varieties motivates studying the derived category of coherent sheaves on a genus one curve or a torsor over an abelian variety over the […]

Shape morphing with swelling hydrogels and expanding foams

Hybrid - G10

Active Matter Seminar Speaker: Abby Plummer, Boston University Title: Shape morphing with swelling hydrogels and expanding foams Abstract: Materials that increase in size offer intriguing possibilities for shape-morphing applications. Here, we explore two such systems—swelling polyacrylamide hydrogels and expanding polyurethane foams. The hydrogels swell by absorbing water into crosslinked polymer networks. They can therefore be […]

Discrete geometry and the modular bootstrap

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

Quantum Matter in Mathematics and Physics Seminar Speaker: Henry Cohn (MIT and Microsoft) Title: Discrete geometry and the modular bootstrap Abstract: In this talk, I'll discuss the remarkable connections between the modular bootstrap and sphere packing or ground state problems discovered by Hartman, Mazáč, and Rastelli in 2019, with a focus on opportunities for further […]

Event Series Member Seminar

Phase diagram and confining strings in a minimal model of nematopolar matter

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

CMSA Member Seminar Speaker: Farzan Vafa Title: Phase diagram and confining strings in a minimal model of nematopolar matter Abstract: We investigate a minimal model of a nematopolar system. We analytically uncover a phase diagram consisting of a locked phase where the polar order and nematic order are locked, and unlocked phases which could be […]

Current Developments in Mathematics Conference 2024

Harvard Science Center 1 Oxford Street, Cambridge, MA

CURRENT DEVELOPMENTS IN MATHEMATICS 2024 APRIL 5-6, 2024 HARVARD UNIVERSITY SCIENCE CENTER LECTURE HALL C REGISTER HERE https://www.math.harvard.edu/event/current-developments-in-mathematics-2024/   Speakers: Daniel Cristofaro-Gardiner - University of Maryland Samit Dasgupta - Duke University Jiaoyang Huang - University of Pennsylvania Daniel Litt - University of Toronto Lisa Piccirillo - MIT/University of Texas Download PDF for a detailed schedule […]

Mirror symmetry for fibrations and degenerations of K3 surfaces

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

Algebraic Geometry in String Theory Seminar Speaker: Alan Thompson (Loughborough University) Title: Mirror symmetry for fibrations and degenerations of K3 surfaces Abstract: In 2016, Doran, Harder, and I conjectured a mirror symmetric relationship between Tyurin degenerations and splittings of codimension 1 fibrations on Calabi-Yau manifolds. In this talk I will discuss recent work to make this […]

Event Series Member Seminar

Global weak solutions of 3+1 dimensional vacuum Einstein equations 

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

CMSA Member Seminar Speaker: Puskar Mondal Title: Global weak solutions of 3+1 dimensional vacuum Einstein equations Abstract: It is important to understand if the `solutions' of non-linear evolutionary PDEs persist for all time or become extinct in finite time through the blow-up of invariant entities. Now the question of this global existence or finite time […]

Event Series General Relativity Seminar

New Well-Posed Boundary Conditions for Semi-Classical Euclidean Gravity

Virtual

General Relativity Seminar Speaker: Xiaoyi Liu, UCSB Title: New Well-Posed Boundary Conditions for Semi-Classical Euclidean Gravity Abstract: We consider four-dimensional Euclidean gravity in a finite cavity.  We point out that there exists a one-parameter family of boundary conditions, parameterized by a real constant, where a suitably Weyl-rescaled boundary metric is fixed, and all give a […]

Mathematical Aspects of Scattering Amplitudes Lecture

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Sabrina Pasterski, Perimeter Institute Title: Radiation in Holography