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Format results
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Talk
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Welcome and Opening Remarks
Neil Turok University of Edinburgh
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The significance of the proper time in the quantum mechanics of the gravitational field.
Claudio Bunster Centro de Estudios Científicos (CECs)
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TBA
Viatcheslav Mukhanov Ludwig-Maximilians-Universität München (LMU)
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Semi-classical evaluation of the 3D gravity path integral and quasi-local holography
Bianca Dittrich Perimeter Institute for Theoretical Physics
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TBA
Emil Mottola Los Alamos National Laboratory
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An asymptotically safe point of view on the gravitational path integral
Astrid Eichhorn Universität Heidelberg
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The path integral for gravity and Fedosov quantization
Stefan Hollands Universität Leipzig
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Surprises in the Path Integral for Gravity
Neil Turok University of Edinburgh
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Talk
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Quantifying the evidence for black holes with GW and EM probes
Paolo Pani Instituto Superior Tecnico - Departamento de Física
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Echoes from the Abyss: Tentative Evidence for Planck-Scale Structure at Black Hole Horizons
Jahed Abedi University of Stavanger (UiS)
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Improvements on the methods for searching echoes
Julian Westerweck Albert Einstein Institute
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A model-independent search for gravitational-wave echoes
Archisman Ghosh Institucio Catalana de Recerca I Estudis Avancats (ICREA) - Universitat de Barcelona
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An alternative significance estimation for the evidence for echoes
Alex Nielsen Albert Einstein Institute
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Discussion: Evidence for Echoes
PIRSA:17110074 -
Inspiral Tests of Strong-field Gravity and Ringdown Tests of Quantum Black Holes
Kent Yagi University of Virginia
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A Recipe for Echoes
Aaron Zimmerman The University of Texas at Austin
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Talk
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Talk
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PSI 2017/2018 - Condensed Matter - Lecture 15
Rakesh Tiwari McGill University - Department of Physics
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PSI 2017/2018 - Condensed Matter - Lecture 14
Rakesh Tiwari McGill University - Department of Physics
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PSI 2017/2018 - Condensed Matter - Lecture 13
Rakesh Tiwari McGill University - Department of Physics
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PSI 2017/2018 - Condensed Matter - Lecture 12
Rakesh Tiwari McGill University - Department of Physics
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PSI 2017/2018 - Condensed Matter - Lecture 11
Rakesh Tiwari McGill University - Department of Physics
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PSI 2017/2018 - Condensed Matter - Lecture 10
Rakesh Tiwari McGill University - Department of Physics
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PSI 2017/2018 - Condensed Matter - Lecture 9
Rakesh Tiwari McGill University - Department of Physics
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PSI 2017/2018 - Condensed Matter - Lecture 8
Rakesh Tiwari McGill University - Department of Physics
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J-Holomorphic Curves and Gromov-Witten Invariants
Holomorphic curves are a central object of study in complex algebraic geometry. Such curves are meaningful even when the target has an almost complex structure. The moduli space of these curves (called pesudoholomorphic curves) is typically non-compact and not well-behaved. A nice compactification, due to Gromov, allows us to define certain invariants known as Gromov-Witten invariants.The theory of Gromov-Witten invariants can be used to deform the usual cohomology ring structure of a symplectic manifold. This has connections, on the one hand, with enumerative geometry, and on the other hand, with deformation of associative algebras and topological quantum field theory. Gromov-Witten invariants have deep connections with physics through the ideas of Mirror Symmetry. Using String Theory, physicists have made amazing predictions about the Gromov-Witten invariants of the quintic threefold. From a mathematical point of view, a large number of predictions are still open.The study of pseudoh...
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Winter School on Quantitative Systems Biology
The International Centre for Theoretical Sciences (ICTS) and the Abdus Salam International Centre for Theoretical Physics (ICTP), are organizing a Winter School on Quantitative Systems Biology (QSB2017) from 4th to 22nd December 2017, as part of the ICTP - ICTS Programme in Biology. This is the sixth school in the series on Quantitative Systems Biology, held alternately at Trieste & Bengaluru. QSB2017 will be hosted in the ICTS campus in Bengaluru.The School is targeted towards young researchers, particularly those at the PhD and post-doctoral level with backgrounds in the physical and mathematical sciences and engineering, who are working in biology or hope to do so. It will give participants a broad introduction to open problems in modern biology, and provide pedagogical instruction on new quantitative approaches being used to address those problems. The main school will be preceded by an intensive one-week pre-school (4th to 9th December 2017) targeted to non-biologists.QSB2017 is f...
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Winter School on Quantitative Systems Biology
The International Centre for Theoretical Sciences (ICTS) and the Abdus Salam International Centre for Theoretical Physics (ICTP), are organizing a Winter School on Quantitative Systems Biology (QSB2017) from 4th to 22nd December 2017, as part of the ICTP - ICTS Programme in Biology. This is the sixth school in the series on Quantitative Systems Biology, held alternately at Trieste & Bengaluru. QSB2017 will be hosted in the ICTS campus in Bengaluru.The School is targeted towards young researchers, particularly those at the PhD and post-doctoral level with backgrounds in the physical and mathematical sciences and engineering, who are working in biology or hope to do so. It will give participants a broad introduction to open problems in modern biology, and provide pedagogical instruction on new quantitative approaches being used to address those problems. The main school will be preceded by an intensive one-week pre-school (4th to 9th December 2017) targeted to non-biologists.QSB2017 is f...
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Consultation on National Education Policy (NEP) 2017
The Ministry of Human Resource Development of the Government of India has set up a committee to prepare the National Education Policy 2017. This discussion meeting will enable the members of the committee to consult broadly and receive inputs to policy from NGOs, academics and experts from Government. The participants will share their valuable inputs based on their experience on the ground. Their broad-based participation will help to enhance the understanding of various dimensions of policy and its implementation.Participation is by invitation only.
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Consultation on National Education Policy (NEP) 2017
The Ministry of Human Resource Development of the Government of India has set up a committee to prepare the National Education Policy 2017. This discussion meeting will enable the members of the committee to consult broadly and receive inputs to policy from NGOs, academics and experts from Government. The participants will share their valuable inputs based on their experience on the ground. Their broad-based participation will help to enhance the understanding of various dimensions of policy and its implementation.Participation is by invitation only.
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Surface Group Representations and Geometric Structures
The focus of this discussion meeting will be geometric aspects of the representation spaces of surface groups into semi-simple Lie groups. Classical Teichmüller theory may be viewed as a starting point of the subject, and following the work of Labourie and Goldman, many exciting developments have taken place when the target group is SL(n, R). Recent work of Kapovich, Leeb and Porti have connected the subject with geometric group theory and higher rank symmetric spaces, opening up new horizons. The aim of this discussion meeting is to expose all these recent developments on the subject and to understand avenues for further directions. The program is an immediate follow up to the ICTS Advanced School: Geometry, Groups and Dynamics-2017.
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Surface Group Representations and Geometric Structures
The focus of this discussion meeting will be geometric aspects of the representation spaces of surface groups into semi-simple Lie groups. Classical Teichmüller theory may be viewed as a starting point of the subject, and following the work of Labourie and Goldman, many exciting developments have taken place when the target group is SL(n, R). Recent work of Kapovich, Leeb and Porti have connected the subject with geometric group theory and higher rank symmetric spaces, opening up new horizons. The aim of this discussion meeting is to expose all these recent developments on the subject and to understand avenues for further directions. The program is an immediate follow up to the ICTS Advanced School: Geometry, Groups and Dynamics-2017.
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The Path Integral for Gravity
Over the past three decades, the idea of a path integral over geometries, describing gravity in various dimensions, has become increasingly central to many areas of theoretical physics, including string and M-theory, holography and quantum aspects of black holes and cosmology.
In each of these areas, the path integral is frequently invoked as a formal device although, as practitioners will admit, except in very special cases the basic formula remains undefined. Typically, classical saddle points are discussed, whether real or complex, but the required integrals are left unperformed.
This state of affairs is untenable because it leaves the theory on a shaky footing and hence does not permit a sound comparison of theoretical predictions with observations. The time has come to critically reassess the foundational ideas of the path integral for gravity, including its definition, evaluation and interpretation; to identify problems with
existing uses and claims based on it, and to seek improvements. The workshop will focus on the continuum theory and its semiclassical limit, with applications to cosmology, black holes and holography. In particular, the notion of a “Euclidean path integral” for a “wavefunction of the universe” will be addressed.To this effect we intend to revisit discussion of “quantum geometrodynamics” from the path integral viewpoint and to pursue various applications. The developments in this direction that took place in the late 1970's and early 1980's were not incorporated in subsequent efforts, where the emphasis shifted to using a classical background with quantum fluctuations superimposed on it, a split which although useful in particular approximations can hardly be imagined to lie at the foundation of the theory. The revival of the discussion of the foundation of the path integral for gravity is made timely, we believe, by the introduction of new global methods such as Picard-Lefschetz theory.
The format of the workshop will be unusual. For the first three days, the mornings will begin with a longer, introductory lecture by each of the three organisers, setting out some of the foundational issues. This will be followed by shorter lectures by the participants, tackling the same foundational questions. The morning lectures, held in the Bob room, will be open to all Perimeter residents and visitors. They will be recorded and made available for viewing on PIRSA. Afternoons will be devoted to friendly and informal discussions, with participants invited to offer short contributions which follow up or develop points raised in the mornings, within a relaxed and highly conducive environment. Participation in these afternoon discussion sessions, as well as social events associated with the workshop, will be limited to registered workshop participants. The last two days of the workshop will be an opportunity for participants to continue discussions on topics which emerge as of greatest general interest, as well as to follow up in smaller groups on technical points or new ideas.
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Quantum Black Holes in the Sky?
The past decade has witnessed significant breakthroughs in understanding the quantum nature of black holes, with insights coming from quantum information theory, numerical relativity, and string theory. At the same time, astrophysical and gravitational wave observations can now provide an unprecedented window into the phenomenology of black hole horizons. This workshop seeks to bring together leading experts in these fields to explore new theoretical and observational opportunities and synergies that could improve our physical understanding of quantum black holes.
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PSI 2017/2018 - Quantum Field Theory II (David)
PSI 2017/2018 - Quantum Field Theory II (David) -
PSI 2017/2018 - Condensed Matter (Tiwari)
PSI 2017/2018 - Condensed Matter (Tiwari) -
Lights, Sounds, Action in Strong Field Gravity.
With LIGO/VIRGO in operation and detecting gravitational waves, the era of gravitational wave astronomy is upon us. In anticipation of further observations, this workshop will discuss the physics, astrophysics, and observational prospects--as well as challenges--in gravitational wave sources including black holes, neutron stars, and other fascinating objects, in both the near and long term.