Triangle Seminars
Tuesday, 26 Jan 2021
Scalar fields variations and the Swampland
Marco Scalisi
(Max Planck Institute for Physics)
Abstract:
The most famous slogan of the Swampland program is that not all effective field theories (EFTs) admit ultraviolet completion into quantum gravity. In this talk, we focus on the significance of this claim for EFTs which involve scalar field variations and on the implications for cosmology. To conclude, we examine some concrete string-phenomenological set-ups with warped throats.
[please email a.held@imperial.ac.uk for zoom link or password]
The most famous slogan of the Swampland program is that not all effective field theories (EFTs) admit ultraviolet completion into quantum gravity. In this talk, we focus on the significance of this claim for EFTs which involve scalar field variations and on the implications for cosmology. To conclude, we examine some concrete string-phenomenological set-ups with warped throats.
[please email a.held@imperial.ac.uk for zoom link or password]
Posted by: IC
Sanya Workshop on Machine-Learning & Algebraic Geometry
Conference: 26 Jan 2021 - 29 Jan 2021
Description:
Organizers
Jonathan Hauenstein (University of Notre Dame)
Yang-Hui He (University of Oxford and City, University of London)
Alexander Kasprzyk (University of Nottingham)
Dhagash Mehta (The Vanguard Group)
Shing-Tung Yau (Harvard University, Tsinghua University and BIMSA)
Support Team
Jiakang Bao (jiakang.bao@city.ac.uk)
Ed Hirst (edward.hirst@city.ac.uk)
Suvajit Majumder (suvajit.majumder@city.ac.uk)
Organizers
Jonathan Hauenstein (University of Notre Dame)
Yang-Hui He (University of Oxford and City, University of London)
Alexander Kasprzyk (University of Nottingham)
Dhagash Mehta (The Vanguard Group)
Shing-Tung Yau (Harvard University, Tsinghua University and BIMSA)
Support Team
Jiakang Bao (jiakang.bao@city.ac.uk)
Ed Hirst (edward.hirst@city.ac.uk)
Suvajit Majumder (suvajit.majumder@city.ac.uk)
Posted by: hey@maths.ox.ac.uk
Wednesday, 27 Jan 2021
Derivation of AdS/CFT for Vector Models
📍 London
Shai Chester
(Weizmann Institute)
Abstract:
We derive an explicit map between the singlet sector of the free and critical O(N) and U(N) vector models in any spacetime dimension above two and to all orders in 1/N, and a bulk higher spin theory in anti-de Sitter space in one higher dimension. For the boundary theory, we use the bilocal formalism of Jevicki et al to restrict to the singlet sector of the vector model. The bulk theory is defined from the boundary theory via our mapping and is a consistent quantum higher spin theory with a well defined action. Our mapping relates bilocal operators in the boundary theory to higher spin fields in the bulk, while single trace local operators in the boundary theory are related to boundary values of higher spin fields.
[Please email alejandro.cabo_bizet@kcl.ac.uk for the Zoom link]
We derive an explicit map between the singlet sector of the free and critical O(N) and U(N) vector models in any spacetime dimension above two and to all orders in 1/N, and a bulk higher spin theory in anti-de Sitter space in one higher dimension. For the boundary theory, we use the bilocal formalism of Jevicki et al to restrict to the singlet sector of the vector model. The bulk theory is defined from the boundary theory via our mapping and is a consistent quantum higher spin theory with a well defined action. Our mapping relates bilocal operators in the boundary theory to higher spin fields in the bulk, while single trace local operators in the boundary theory are related to boundary values of higher spin fields.
[Please email alejandro.cabo_bizet@kcl.ac.uk for the Zoom link]
Posted by: andrea
Thursday, 28 Jan 2021
Quantum Natural Language Processing on NISQ hardware
Konstantinos Meichanetzidis
(Oxford)
Abstract:
[Please inqure jung-wook(dot)kim(at)qmul(dot)ac(dot)uk for the zoom link]
Taking advantage of mathematical similarities between grammar models and quantum theory, we present a canonical way of instantiating grammatical sentences as quantum circuits. In the context of quantum machine learning, we define toy natural language processing tasks and implement them on readily accessible quantum processors, such as those provided by IBMQ.
[Please inqure jung-wook(dot)kim(at)qmul(dot)ac(dot)uk for the zoom link]
Taking advantage of mathematical similarities between grammar models and quantum theory, we present a canonical way of instantiating grammatical sentences as quantum circuits. In the context of quantum machine learning, we define toy natural language processing tasks and implement them on readily accessible quantum processors, such as those provided by IBMQ.
Posted by: QMW
2D dilaton-gravity, matrix models, and the minimal string
Gustavo Turiaci
(UC Santa Barbara)
Abstract:
In the first part of this talk I will review the recent realization that a large class of two-dimensional theories of dilaton-gravity in asymptotically AdS space are holographically dual to a random matrix model. In this description the matrix represents a random boundary Hamiltonian, and its probability distribution depends on the dilaton potential in a specific way. In the second part of the talk I will explain the relation between two-dimensional dilaton-gravity and the minimal string theory.
–––––––––– Part of the London Integrability Journal Club. New participants please register using the form at integrability-london.weebly.com.
In the first part of this talk I will review the recent realization that a large class of two-dimensional theories of dilaton-gravity in asymptotically AdS space are holographically dual to a random matrix model. In this description the matrix represents a random boundary Hamiltonian, and its probability distribution depends on the dilaton potential in a specific way. In the second part of the talk I will explain the relation between two-dimensional dilaton-gravity and the minimal string theory.
–––––––––– Part of the London Integrability Journal Club. New participants please register using the form at integrability-london.weebly.com.
Posted by: andrea