Please, no more about the only string theory can compute the Black Hole entropy arguments. it is true that experiments are real physics. With what result? Matilde Marcolli As an application, I will use conformal bootstrap techniques to obtain new rigorous bounds on the first positive Laplacian eigenvalue of hyperbolic orbifolds. In response to the obvious question about relation to experiment and testability, people have clearly completely given up on this, with nothing to say (other than a bogus claim that string theory makes some prediction about B-mode polarization), going on about how it took thousands of years for the atomic hypothesis to be vindicated. In the present talk we show that the string theory duals of these systems are classically integrable. [Slides], Aranya Bhattacharya (IISc, Bangalore) rev2023.3.3.43278. !) August 2-7, 2021: International Congress on Mathematical Physics (ICMP) 2021 (session Quantum Field Theory), Geneva, Switzerland. Abstract: In this talk I will introduce a refined notion of Gopakumar-Vafa invariants on singular Calabi-Yau threefolds that generate a discrete gauge symmetry in M-theory. [Slides] [Video], Sam Raskin (University of Texas at Austin) This is joint work with Constantin Teleman and Greg Moore. Philip Candelas From the README: They have obvious applications to atomic physics. Participant responses to online questionnaire, Clickhereto use the Slack workspace of Strings 2021. Title: Families of Modular Flux Vacua on Symmetric CY Threefolds The qubit example is a bit unfair since in some sense its the quantization of the sphere, although this sphere is not a classical limit of the quantum theory (and sphere isnt a cotangent bundle of some configuration space). Symmetries, Horizons, and Black Hole Entropy [https://arxiv.org/abs/0705.3024] [Slides], Muyang Liu (Uppsala University) He goes on to explain the landscape philosophy, which he sees string theorists (and himself) as now adopting. How to properly convert string into int to calculate in JS? Talks are available for watching every day via Youtube, links are on the main page. The recording of the lecture can be found here. The general principle is that whenever you have a group acting on a physical quantum system, the state space will be a unitary representation of that group, and unitary representations break up into irreducible representations. In a different direction, I will in this talk present a conjectural picture relating holomorphic Floer theory of complex integrable systems to Donaldson-Thomas invariants. If you cannot make it work with a default operator, I suggest you ask a new question, pointing out where exactly you get stuck. Boris Pioline (Universit Pierre et Marie Curie) Update: In the final discussion section, Witten emphasizes that What is string theory? still has no answer, that we have little idea what it really is. Exactly because of this. Abstract: I will be discussing my recent work [2110.08179] with Chris Blair and Dan Thompson on topology change in Poisson-Lie T-duality with spectators (i.e. The hyperKahler branches can be characterized by a combinatorial object known as a magnetic quiver. Title: Automorphic Spectra and the Conformal Bootstrap How do I align things in the following tabular environment? In my case, I will give a run, certainly much more healthy, no? It seems that no one in the string theory community dares to publicly breathe a word of skepticism. Abstract: During my presentation, I will discuss certain equivalences between conformal field theories with a continuous spectrum: Liouville theory, its supersymmetric extension, and models based on the affine su(2) algebra with irrational level. The LQG derivation, involving an ad-hoc choice for the Immirzi parameter Local nodes will be coordinated worldwide for the joint viewing of talks and discussion sessions, and online satellite meetings during other time periods will be linked on this webpage. Physics Meets AI, LMU Munich, September 2020. I believe that your permanent opposing the string hypes is good and welcomed. Weekly on Mondays 2:10 PM (Pacific Time) Meetings are in-person, at 402 Physics South. The program is based on two main ingredients: The complex geometry of the underlying moduli spaces on the one hand, and cluster algebra structures defined by BPS- or DT-invariants on the other hand. Theres a long list of things they are talking about under the name string theory, with the generic problem that the ones that are reasonably well-defined have nothing to do with the real world (e.g., wrong dimension). This is a joint work with K. Ohmori (U. Tokyo). Juan Maldacena The University of Warsaw The University of Warsaw, founded in 1816, is the largest university in Poland and a leading research centre in the country and in this region of Europe. As an example, we compute the trace evaluated on the unit constant chiral chain and obtain the formal Witten genus in the Lie algebra cohomology. Finally, I will mention how some of these features are likely to persist in a proposal for the worldsheet dual of free N=4 Super Yang-Mills theory. [Slides], Thorsten Schimannek (LPTHE Paris) Thank you. Miosz Panfil We also explain how these invariants and homologies will be categorified in the process, and discuss their higher categorification. In the presence of chiral multiplets that are added to plumbing graphs, we show that ST-transformations lead to many equivalent plumbing theories, and hence generalize the scope of Kirby moves. Hawking tells you what the semiclassical limit is. The talk is based on work in collaboration with Davide Gaiotto. Workshop on Categorification and geometric representation theory. It will often be a good idea to analyze states in terms of these irreducible representations. Abstract: Holographic tensor networks are discrete models of AdS/CFT that satisfy complementary recovery of quantum information and the Ryu-Takayanagi formula, which relates the boundary entanglement entropy to the area of extremal surfaces in the bulk. Physically, flow treesprovide a mesoscopic representation of BPS states as nested multi-centered bound states of elementary constituents. To address the problem of quantization of a space with gauge fields, first the structure that in the smooth (i.e. Ill explain this phenomenon, and propose a new effective algorithm for the calculation of the spectrum which is not based on quantum algebra at all (joint work in progress with A. Soibelman). I notice that Roger Penrose, a well-know string theory skeptic, will be giving a talk on the last day of the conference next week. Please, do appreciate that negative comments like yours distort the ideas the general public (or even physicists in other areas) have about String Theory, or Theoretical Physics in general. where the dualisable dimensions are fibred over a `spectator base). String Math 2021 - Lara Anderson (Virginia Tech) - YouTube IMPA, Rio de Janeiro, June 14 - 18, 2021- Turned into an online eventSpeaker: Lara Anderson (Virginia Tech)Lecture title:. While Ooguri has his own interpretation about this observation (incoming flux of young people in the field is as healthy as ever), I wonder what others think about it. This includes joint work with David Ben-Zvi, David Jordan, Pavel Safronov, Monica Vazirani, and Haiping Yang. Tony Pantev These models share the general structure of the so-called canonical LG-models; constructed by Marsh, Pech, Rietsch and Williams for Grassmannians, Lagrangian Grassmannians and quadrics, and we will discuss our ongoing efforts in unifying the models into a type-independent canonical model. In the discussion section, Vafa challenges him on this, saying he sees no indication that quantum information theory gives any insight into dualities he sees as the central aspect of the non-perturbative theory. There is also an open source implementation on GitHub, evaluator.js, and an NPM package. Adrian Langer [Slides] [Video], Mayuko Yamashita (Kyoto University) Abstract: Knizhnik-Zamolodchikov equation, originally found in the context of a two dimensional conformal field theory, has recently been found in the context of instanton counting, albeit with a significantly extended domain of allowed parameters (level, spins etc). A limit involving the quotient of two sums. Title: The sphere packing problem and beyond. String-Math 2015, Hainan Island, China (December 31, 2015 - January 4, 2016; How to Quantize Gravity. IMPA, Rio de Janeiro, June 14 - 18, 2021- Turned into an online eventSpeaker: Giovanni Felder (ETH Zrich)Lecture title: Superstring measure and the superper. Jackiw-Teitelboim/PeterH, Once again, this is just an opinion. I agree with Felix. StringStringBuilderStringBufferMath. Suomynona, from 9:30 15:00 in So Paulo (8:30 14:00 in NY, 14:30 20:00 in Paris). He mentions that one basic problem with this is that there is no understanding of what happens in time-dependent backgrounds, so, in particular, this is useless for addressing the big bang, which is the one place people now point to as a possible connection to real world data. How would you please implement. This is damaging. Also I explain what is the dimension for a mathematician and why it is an extremely useful concept for everyone. To begin with, we'll discuss a few third-party libraries and their usage. These higher-categories are constructed by equivariantizing higher-categories corresponding to invertible higher-form symmetries. We will focus on understanding 3d mirror symmetry viachiralalgebras. The linking numbers of plumbing graphs are interpreted as the effective mixed Chern-Simons levels of 3d N=2 theories with chiral multiplets. [Slides], Nicolo Piazzalunga (Uppsala University) How is the idea that particles are irreducible representations of the Poincar group work in the context of quasiparticles in condensed matter physics, where the underlying system background is generally not symmetric under Poincar transformations (e.g. Title: Vafa-Witten Theory: Invariants, Floer Homologies, Higgs Bundles, a Geometric Langlands Correspondence, and Categorification [online talk] The unitary equivalence relation implies a duality between the modular flow and time evolution. I will present recent progress in this direction in the simplest case of local $P^2$, and argue that its global BPS spectrum and flow tree structure can be deduced from a scattering diagram with simple initial data. There are other views, it is a matter of taste. Any consistent theory of quantum gravity should reproduce this semiclassical limit. you see Ed Witten, and then Shiraz Minwalla, basically agreeing with you. Abstract: The spectrum of BPS states in D=4 supersymmetric field theories and string vacua famously jumps across codimension-one walls in vector multiplet moduli space. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. This story also relates to the higher-form global symmetry. Additionally, Evaluator.js intelligently reports invalid syntax, such as a misused operator, missing operand, or mismatched parentheses. Chen-Te Ma (Asia Pacific Center for Theoretical Physics) Making statements based on opinion; back them up with references or personal experience. Abstract: The sphere packing problem is a very natural geometric question and it has a long and exciting history. They are exactly solvable in terms of Whittaker functions. Abstract: We discuss the partition functions of topologically twisted 5d SU(2) supersymmetric Yang-Mills theory on X x S1, where X is a smooth closed four-manifold. The two-step procedure involves first finding points on the Calabi-Yau manifold and then approximating the Ricci-flat metric by approximating solutions to the underlying Monge-Ampere equation. I just work on Theoretical Physics topics. One can add superpotentials, which lead to Seiberg-like dualities between plumbing graphs with triangles. Rafa R. Suszek, Louis Alvarez-Gaume The methods can also be extended to SU(n) or G2 structure metrics This community is indeed becoming like a religious cult, something one of the speakers explicitly denied. But this procedure you adopted in this post, is not the best way of understanding science, or communicating it. And how I regret it, D-branes also Title: The positive Grassmannian, amplituhedron, and cluster algebras [online talk] Title: Knizhnik-Zamolodchikov revisited: (non)supersymmetric gauge theories, defects, and localization (iii) Most superstring calculations are performed under euclidean worldsheet for many practical reasons, as we all know and love from Wicks rotation in standard q.f.t.s. There will also be a public lecture and outreach activity Ask a String Theorist during the weekend. APCS. rotations and translations are typically discretized due to the presence of a lattice)? Of course there are many ways to obtain the BH formula that do not try to identify the microscopic degrees of freedom in a theory of QG, the original calculation from the 70s being an obvious example. He never actually gets anywhere near discussing the topic of the title for the talks, but does give a very nice leisurely introduction to computing amplitudes for zero-mass particles. Can I did this command pattern if I declare the operator how it were a variable? Rio de Janeiro, RJ, CEP 22460-320, Brasil [Slides] [Video], Yaping Yang (University of Melbourne) Update: At String 2021, yesterday Nima Arkani-Hamed gave a talk on Connecting String Theory to the Real World We See Outside Our Windows, where he sometimes sounds like me, contrasting the pre-LHC claims of string theorists: 1. I wonder how to find the number of ternary strings that have at least one 0, one 1 and one 2. Its explicit description as a QFT has remained elusive. As Peter keeps on repeating, the denial of the string community to acknowledge the failure of string theory as a unification theory (which is nothing to be ashamed off: physics is full of beautiful theory that are not correct) is a shame for the physics community. Abstract: I will review the Cohomological Hall algebra associated to a quiver and an oriented cohomology theory. Title: Cohomological-type Hall algebras and their representation theory We engineer these models using toric geometry techniques to construct non-compact threefolds that manifestly have multiple fibrations and hence M/F-theory lifts. Extending this story, I will talk about other physical realizations of analytically continued systems, such as Regge poles, replicas, or dimensional regularization. Title: Geometry of Higher-Form Group Structures in String Theory However, I have provided a pure JS solution (w/o eval). He discusses the swampland philosophy, but gives as a challenge to theorists just making more precise the sort of empty question that this philosophy deals in (he asks whether D=9 SU(2021) to the power 2021 is in the swampland). Title: Dirac-Coulomb Hamiltonians[online talk] Abstract: Trace map on deformation quantized algebra leads to the algebraic index theorem. This topic has been recently explored,from several differentperspectives,by Kontsevich-Soibelman and Doan-Rezchikov. [Slides] [Video], Netta Engelhardt (MIT) In the ending remark, Ooguri makes the observation that the percentage of speakers older than him is roughly a linear function (64-2x)% where x is the number of years after his PhD. What sort of strategies would a medieval military use against a fantasy giant? 2. Strings 2021 started today, program is available here. Title: Quantum curves and vertex algebras The LQG example hardly qualifies if you do not have any way to fix the Immirzi parameter and just tune it to get the desired result. Elliott Gesteau (California Institute of Technology) [Slides] [Video], Conan Leung (Chinese University of Hong Kong) http://silentmatt.com/javascript-expression-evaluator/, http://www.codeproject.com/KB/scripting/jsexpressioneval.aspx, I spent a couple of hours to implement all the arithmetical rules without using eval() and finally I published a package on npm string-math. Our conjecture, which we have developed with Ben-Zvi, Gunningham and Safronov, asserts an equality of dimensions between the G- and G^L-skein modules of a 3-manifold at generic quantization parameter. At the time I drop those lines, more than 50 years from dual resonance models?, I havent found any convincingly argument. [Slides] [Video], Vincent Vargas (University of Geneva) Do I need a thermal expansion tank if I already have a pressure tank? We physically derive (i) a novel Vafa-Witten four-manifold invariant associated with this moduli space, (ii) their relation to Gromov-Witten invariants, (iii) a novel Vafa-Witten Floer homology assigned to three-manifold boundaries, (iv) a novel Vafa-Witten Atiyah-Floer correspondence, (v) a proof and generalization of a conjecture by Abouzaid-Manolescu about the hypercohomology of a perverse sheaf of vanishing cycles, (vi) a Langlands duality of these invariants, Floer homologies and hypercohomology, and (vii) a quantum geometric Langlands correspondence with purely imaginary parameter that specializes to the classical correspondence in the zero-coupling limit, where Higgs bundles feature in (ii), (iv), (vi) and (vii). Leszek Hadasz (Jagiellonian University) This feature could come in handy in projects where we want to evaluate math expressions provided in string format. Title: Bootstrapping AdS/BCFT The CY manifolds admitting supersymmetric flux vacua can be associated to elliptic, Hilbert, or Bianchi modular forms, depending on the field the complex structure moduli of the CY take values in. But keep in mind that using the Function constructor in this way is similar to eval() in that the risks may be comparable. Berkeley Informal String-Math Seminar. [Slides], Mateo Galdeano (University of Oxford) One reason for this being a real mistake is that, divorced from input from the real world, theory becomes sterile: Questions Posed by Nature are Vastly Deeper and more fruitful than ones we humans tend to pose for ourselves. His third talk emphasizes thinking of space-time vectors as two by two matrices (see section 40.4 of my QM book). Abstract: We explore little string theories in six dimensions, constructed via F-theory that are dual to heterotic stringswith NS5 branes probing ADE type singularities. But it is clear that these colleagues are attempting to understand topics in QFT and Gravity, with the tools they have at hand. I just had a look at that session, and more than anything, felt sorry seeing such eminent physicists giving such vacuous reasons just for the sake of defending a theory they have worked on for a long time. Correlation functions in the worldsheet theory on AdS_3 are shown to agree with those of the dual CFT_2, with both being given in terms of branched covers. You will have to use the Number.isNaN() method to do it. Mathematically, they can be identified with the K-theoretic versions of the Donaldson invariants on X. We introduce a new idea, boundary averaging, to address the question: Does averaging also work well in AdS/BCFT? A Triangle of Influence: Bringing Together Physics, Pure Mathematics, and Computer Science. Chrome's Content Security Policy will still throw EvalError, Creating constructor doesn't make sense here and it takes unnecessary resources. The original sphere packing problem in dimension 3 is known as Keplers conjecture and it was famously solved by Thomas Hales at the very end of the twentieth century. The plumbing graphs with matter can be viewed as certain kinds of quiver diagrams for 3d N=2 theories. Organizing Committee:Henrique Bursztyn (IMPA)Reimundo Heluani (IMPA)Marcos Jardim (IMECC-UNICAMP)Gonalo Oliveira (UFF) Scientific Committee:Anton Alexeev (Universit de Genve)David Ben-Zvi (University of Texas)Alexander Braverman (Brown University)Ron Donagi (University of Pennsylvania)Giovanni Felder (ETH Zrich)Dan Freed (University of Texas)Edward Frenkel (University of California)Marco Gualtieri (University of Toronto)Nigel Hitchin (University of Oxford)Sheldon Katz (University of Illinois)Maxim Kontsevich (IHS)David Morrison (University of California)Andrei Okounkov (Columbia University)Vasily Pestun (IHS)Boris Pioline (Sorbonne Universit \u0026 CNRS)Nicolai Reshetikhin (University of California)Pedro Vieira (Perimeter Institute for Theoretical Physics)Katrin Wendland (Albert-Ludwigs-Universitt Freiburg)Edward Witten (Institute for Advanced Study)Shing-Tung Yau (Harvard University \u0026 The Chinese University of Hong Kong)Maxim Zabzine (Uppsala University)Steering Committee: Ron Donagi (University of Pennsylvania)Dan Freed (University of Texas at Austin)Nigel Hitchin (University of Oxford)Sheldon Katz (University of Illinois)Maxim Kontsevich (IHS)David Morrison (University of California)Hiroshi Ooguri (Caltech \u0026 IPMU)Boris Pioline (Universit Pierre et Marie Curie)Joerg Teschner (DESY)Edward Witten (Institute for Advanced Study)Shing-Tung Yau (Harvard University)Redes Sociais do IMPA: https://linktr.ee/impabrIMPA - Instituto de Matemtica Pura e Aplicada https://impa.br | http://impa.br/videos#stringmath2021 Os direitos sobre todo o material deste canal pertencem ao Instituto de Matemtica Pura e Aplicada, sendo vedada a utilizao total ou parcial do contedo sem autorizao prvia e por escrito do referido titular, salvo nas hipteses previstas na legislao vigente.The rights over all the material in this channel belong to the Instituto de Matemtica Pura e Aplicada, and it is forbidden to use all or part of it without prior written authorization from the above mentioned holder, except in the cases prescribed in the current legislation.

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