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Talk
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Symmetry, topology, and thermal stability
Stephen Bartlett University of Sydney
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Symmetry-protected topologically ordered phases for measurement-based quantum computation
Akimasa Miyake University of New Mexico
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A resource theory of nonclassicality in Bell scenarios
Robert Spekkens Perimeter Institute for Theoretical Physics
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Variational Quantum Eigensolvers and contextuality
Peter Love Tufts University
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Magic resource theories and classical simulation
Earl Campbell University of Sheffield
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Classical algorithms for quantum mean values
David Gosset Institute for Quantum Computing (IQC)
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Fine-grained quantum supremacy and stabilizer rank
Tomoyuki Morimae Kyoto University
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Towards local testability for quantum coding
Anthony Leverrier Inria Paris Centre
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Talk
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Welcome and Opening Remarks
Bianca Dittrich Perimeter Institute for Theoretical Physics
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Quantum Spacetime from Lattice Gravity à la CDT
Renate Loll Radboud Universiteit Nijmegen
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How complement maps can cure divergences
Sylvie Paycha University of Potsdam
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The gravitational Wilson loop and the non-Abelian Stokes' theorem
Reiko Toriumi Okinawa Institute of Science and Technology Graduate University
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The dynamics of difference
Lee Smolin Perimeter Institute for Theoretical Physics
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Probing fundamental physics with gravitational waves
Cecilia Chirenti Universidade Federal do ABC
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Implications of the Quantum Nature Space-time for the Big Bang and Black Holes
Abhay Ashtekar Pennsylvania State University
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Talk
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Talk
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PSI 2019/2020 - Condensed Matter (Wang) - Lecture 16
Lauren Hayward Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Condensed Matter (Wang) - Lecture 15
Chong Wang Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Condensed Matter (Wang) - Lecture 14
Chong Wang Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Condensed Matter (Wang) - Lecture 13
Chong Wang Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Condensed Matter (Wang) - Lecture 12
Chong Wang Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Condensed Matter (Wang) - Lecture 11
Chong Wang Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Condensed Matter (Wang) - Lecture 10
Chong Wang Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Condensed Matter (Wang) - Lecture 9
Chong Wang Perimeter Institute for Theoretical Physics
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Talk
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Introduction to Everpresent Lambda
Rafael Sorkin Perimeter Institute for Theoretical Physics
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Status of Hubble tension in Cosmology
Niayesh Afshordi University of Waterloo
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Causal Set Action/Entropy
Yasaman Kouchekzadeh Yazdi Dublin Institute For Advanced Studies
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Observational constraints on modified gravity and dark energy
Jian Li Simon Fraser University (SFU)
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Supplementary considerations on Everpresent Lambda
Rafael Sorkin Perimeter Institute for Theoretical Physics
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Implementing a stochastic dark energy framework into CAMB
Levon Pogosian Simon Fraser University (SFU)
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Symmetry, Phases of Matter, and Resources in Quantum Computing
Our conference covers three related subjects: quantum fault-tolerance magic states and resource theories and quantum computational phases of matter. The linking elements between them are (a) on the phenomenological side the persistence of computational power under perturbations and (b) on the theory side symmetry. The latter is necessary for the working of all three. The subjects are close but not identical and we expect cross-fertilization between them.Fault tolerance is an essential component of universal scalable quantum computing.However known practical methods of achieving fault tolerance are extremely resource intensive. Distillation of magic states is in the current paradigm of fault-tolerance the costliest operational component by a large margin. It is therefore pertinent to improve the efficiency of such procedures study theoretical limits of efficiency and more generally to establish a resource theory of quantum state magic. During the workshop we will focus on a fundamental connection between fault-tolerant protocols and symmetries.``Computational phases of matters are a surprising link between quantum computation and condensed matter physics. Namely in the presence of suitable symmetries the ground states of spin Hamiltonians have computational power within the scheme of measurement-based quantum computation and this power is uniform across physical phases. Several computationally universal phases have to date been discovered. This subject is distinct from the above but linked to them by the feature of persistence of computational power under deformations and deviations.
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Emmy Noether Workshop: The Structure of Quantum Space Time
Understanding the small-scale structure of spacetime is one of the biggest challenges faced by modern theoretical physics. There are many different attempts to solve this problem and they reflect the diversity of approaches to quantum gravity. This workshop will bring together researchers from a wide range of quantum gravity approaches and give them an opportunity to exchange ideas and gain new insights.
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PSI 2019/2020 - Quantum Field Theory II (David)
PSI 2019/2020 - Quantum Field Theory II (David) -
PSI 2019/2020 - Condensed Matter (Wang)
PSI 2019/2020 - Condensed Matter (Wang) -
Everpresent Lambda: Theory Meets Observations
One of the biggest mysteries in cosmology and fundamental physics is the nature of dark energy that is responsible for the current acceleration of cosmic expansion. While a cosmological constant provides the simplest model of dark energy recent observational tensions amongst supernovae Ia gravitational lensing time delays and cosmic microwave background suggest the need for a more complex dynamical dark energy. One of the oldest proposals for a dynamical dark energy is Everpresent Lambda proposed by Sorkin which is inspired by the causal set model of quantum gravity. It was recently shown that this model can potentially resolve the tensions in cosmological observations. The meeting aims to bring together a small number of experts in quantum gravity causal sets and cosmology to carefully examine the models theoretical predictions and its observational tests and pave the way for what might be an(other) exciting insight from cosmology into the fundamental nature of spacetime.
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Thermalization, Many body localization and Hydrodynamics
How do isolated quantum systems thermalize? This is a fundamental question that is related to the foundations of quantum statistical mechanics and also to the question of the arrow of time. The first study goes back to John von Neumann in 1929. Recently, this question was revived, fuelled by several new concepts in theory along with many relevant experiments. This question is now shared by many fields such as statistical physics, mathematical physics, quantum information and cold atomic systems, and the studies around this question have become interdisciplinary. In the broad context of this basic fundamental question, three closely related areas of research have emerged.ThermalizationMany Body Localization (MBL)Hydrodynamical description of many body systemsThis three-week program aims to bring together researchers working in these areas to discuss recent progress in the field, and hopes to lead to collaborative efforts towards solution of some of the outstanding problems. Apart from ...
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Thermalization, Many body localization and Hydrodynamics
How do isolated quantum systems thermalize? This is a fundamental question that is related to the foundations of quantum statistical mechanics and also to the question of the arrow of time. The first study goes back to John von Neumann in 1929. Recently, this question was revived, fuelled by several new concepts in theory along with many relevant experiments. This question is now shared by many fields such as statistical physics, mathematical physics, quantum information and cold atomic systems, and the studies around this question have become interdisciplinary. In the broad context of this basic fundamental question, three closely related areas of research have emerged.ThermalizationMany Body Localization (MBL)Hydrodynamical description of many body systemsThis three-week program aims to bring together researchers working in these areas to discuss recent progress in the field, and hopes to lead to collaborative efforts towards solution of some of the outstanding problems. Apart from ...
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Sphere Packing
Sphere packing is a centuries-old problem in geometry, with many connections to other branches of mathematics (number theory, communication theory, Lie theory, optimization) as well as, physics, material science and chemistry. In the recent years, there have been some remarkable advances in higher-dimensional sphere packing and the associated physics question of energy minimization, coming from methods of modular forms and optimization. Sphere packing continues to be an active area of research, with a long list of interesting and accessible questions. The goal of this meeting is to introduce the subject to a diverse group of mathematicians, and to updated them on the new developments and research problems faced in this area of research.A series of lectures will address the different facets of sphere packing and questions associated with it. It will also highlight, new techniques and open-up the challenges and problems that one can come across. A total of ten lectures will be held over...
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Sphere Packing
Sphere packing is a centuries-old problem in geometry, with many connections to other branches of mathematics (number theory, communication theory, Lie theory, optimization) as well as, physics, material science and chemistry. In the recent years, there have been some remarkable advances in higher-dimensional sphere packing and the associated physics question of energy minimization, coming from methods of modular forms and optimization. Sphere packing continues to be an active area of research, with a long list of interesting and accessible questions. The goal of this meeting is to introduce the subject to a diverse group of mathematicians, and to updated them on the new developments and research problems faced in this area of research.A series of lectures will address the different facets of sphere packing and questions associated with it. It will also highlight, new techniques and open-up the challenges and problems that one can come across. A total of ten lectures will be held over...
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Gravitational Waves Outside the Boxes
With the era of gravitational wave astronomy started and a rapid increase in sensitivity and frequency bands, unprecedented opportunities to unravel long-standing questions as well as new opportunities open up. This workshop will focus on discussing out-of-the-box ideas for this exciting field.
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Group Algebras, Representations and Computation
Determining explicit algebraic structures of semisimple group algebras is a fundamental problem, which has played a central role in the development of representation theory of finite groups. The tools of representation theory of finite groups extend in various ways to profinite groups such as compact linear groups over ring of integers of a local field (for example GL_n(Z_p)). However the continuous representations or even representation growth of profinite groups is not well understood and is one of the current exciting areas of research. The importance of computational methods in all pursuits of pure mathematics is no more obscure, and the subject has established itself as a powerful tool, aiding quick maturing of intuition about concrete mathematical structures. The focus of this program is on theoretical aspects of group algebras and representation theory of finite and profinite groups complemented by computational techniques using discrete algebra system GAP.The first part of this...
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Group Algebras, Representations and Computation
Determining explicit algebraic structures of semisimple group algebras is a fundamental problem, which has played a central role in the development of representation theory of finite groups. The tools of representation theory of finite groups extend in various ways to profinite groups such as compact linear groups over ring of integers of a local field (for example GL_n(Z_p)). However the continuous representations or even representation growth of profinite groups is not well understood and is one of the current exciting areas of research. The importance of computational methods in all pursuits of pure mathematics is no more obscure, and the subject has established itself as a powerful tool, aiding quick maturing of intuition about concrete mathematical structures. The focus of this program is on theoretical aspects of group algebras and representation theory of finite and profinite groups complemented by computational techniques using discrete algebra system GAP.The first part of this...