COVID-19 information for PI Residents and Visitors
Important Information Regarding COVID-19 Coronavirus
Due to the COVID-19 pandemic, this event will now take place virtually.
The conference “Quantum Gravity 2020“ has a deliberately broad scope. We aim to include participants from all current approaches to quantum gravity, as well as researchers working on the phenomenology of quantum gravity. The main goal of the meeting is to assess the progress made and to constructively and openly discuss open questions in our understanding of quantum gravity.
A second goal is to work towards combining the insights gained in the various approaches. In its overall goal as well as the format, this conference will differ from more specialized meetings that focus on specific quantum-gravity approaches.
We hope that this inaugural conference “Quantum Gravity“ can make a contribution to bridging the gaps between quantum gravity approaches, and bring the entire community together for a constructive and fruitful exchange.
The deadline to register for this event is April 30, 2020. Registration will close before this date if capacity is met. Registration for this event is now closed.
Sponsorship for this event has been provided by:
- Sylvain Carrozza, Perimeter Institute
- Clifford Cheung, California Institute of Technology
- Netta Engelhardt, Massachusetts Institute of Technology
- Steve Giddings, University of California, Santa Barbara
- Daniel Harlow, Massachusetts Institute of Technology
- Ted Jacobson, University of Maryland
- Renate Loll, Radboud University Nijmegen
- Henry Maxfield, University of California, Santa Barbara
- Hermann Nicolai, Albert Einstein Institute
- Monica Pate, Harvard University
- Alejandro Perez, Centre de Physique Theorique de Luminy
- Mairi Sakellariadou, King's College London
- Frank Saueressig, Radboud University Nijmegen
- Sumati Surya, Raman Research Institute
- Herman Verlinde, Princeton University
- Aron Wall, University of Cambridge
- Silke Weinfurtner, Nottingham University
- Niayesh Afshordi, Perimeter Institute & University of Waterloo
- Ivan Agullo, Louisiana State University
- Ahmed Almheiri, Institute for Advanced Study
- Chris Akers, Massachusetts Institute of Technology
- Dionysios Anninos, Kings College London
- Cesar Arias, University of California, Davis
- Danilo Artigas Guimarey, Aix-Marseille University
- Michele, Arzano, Istituto Nazionale di Fisica Nucleare
- Seth Kurankyi Asante, Perimeter Institute
- Ivana Babić, Ludwig-Maximilians-Universität München
- Angel Ballesteros, Universidad de Burgos
- Glenn Barnich, Université Libre de Bruxelles
- Heliudson Bernardo, McGill University
- Emil Bjerrum-Bohr, Niels Bohr Institute
- Martin Bojowald, Pennsylvania State University
- Francisco Borges, Perimeter Institute
- Suddhasattwa Brahma, McGill University
- Robert Brandenberger, McGill University
- Timothy Budd, Radboud University Nijmegen
- Luca Buoninfante, Tokyo Institute of Technology
- Cliff Burgess, Perimeter Institute & McMaster University
- ChunJun Cao, University of Maryland
- Steven Carlip, University of California, Davis
- Alicia Castro, Radboud University Nijmegen
- Venkatesa Chandrasekaran, University of California, Berkeley
- Lin-Qing Chen, Okinawa Institute of Science and Technology
- David Craig, Oregon State University
- Sean Crowe, Jagiellonian University
- William Cunningham, Perimeter Institute
- Erik Curiel, Ludwig-Maximilians-Universitat Munchen
- Marco de Cesare, University of New Brunswick
- Fay Dowker, Imperial College London
- Maïté Dupuis, Perimeter Institute
- Nick Early, Perimeter Institute
- Joshua Erlich, William & Mary
- Llorenç Espinosa-Portalés, Instituto de Física Teórica
- Renata Ferrero, Johannes Gutenberg University of Mainz
- Sebastian Fischetti, McGill University
- Guilherme Franzman, NORDITA
- Klaus Fredenhagen, University of Hamburg
- Laurent Freidel, Perimeter Institute
- Tobias Fritz, Perimeter Institute
- Markus Fröb, Leipzig University
- Nava Gaddam, Utrecht University
- Rodolfo Gambini, Universidad de Montevideo
- Marc Geiller, École normale supérieure
- Ghazal Geshnizjani, Perimeter Institute & University of Waterloo
- Elliott Gesteau, Perimeter Institute
- Mahdis Ghodrati, Yangzhou University & Shanghai Jiaotong University
- Flaminia Giacomini, Perimeter Institute
- Serena Giardino, University of Szczecin
- Cecilia Giavoni, Ludwig-Maximilians-Universitat Munchen
- Lisa Glaser, University of Vienna
- Finnian Gray, Perimeter Institute
- Giulia Gubitosi, University of Burgos
- Shahar Hadar, Harvard University
- Hal Haggard, Bard College
- Sabine Harribey, Centre de Physique Théorique
- Aaron Held, Imperial College London
- Yannick Herfray, Université Libre de Bruxelles
- Sergio Hoertner, University of Amsterdam
- Philipp Höhn, Okinawa Institute of Science and Technology
- Vahid Hosseinzadeh, Institute for Fundamental Research in Science
- Xuyao Hu, New York University
- Viqar Husain, University of New Brunswick
- Anna Ijjas, Max Planck Institute for Gravitational Physics
- Michael Imseis, University of Waterloo
- Ding Jia, Perimeter Institute
- Clifford Johnson, University of Southern California
- Wojchech Kaminski, University of Warsaw
- Jarod Kelly, University of New Brunswick
- Josh Kirklin, University of Cambridge
- John Klauder, Retired from the University of Florida
- Benjamin Knorr, Perimeter Institute
- David Kubiznak, Perimeter Institute
- Folkert Kuipers, University of Sussex
- Ohkyung Kwon, University of Chicago
- Matteo Laudonio, University of Bordeaux
- Wei Li, Chinese Academy of Sciences
- Stefano Liberati, SISSA
- Mercedes Martin-Benito, Universidad Complutense de Madrid
- Pedro Jorge Martínez, Instituto de Física La Plata
- Alex May, University of British Columbia
- Christoph Minz, University of York
- Seyed Faroogh Moosavian, McGill University
- Javier Moreno, Pontifical Catholic University of Valparaíso
- Emil Mottola, Los Alamos National Laboratory
- Harish Murali, Purdue University
- Yasha Neiman, Okinawa Institute of Science and Technology
- Dominik Neuenfeld, Perimeter Institute
- Kevin Nguyen, Harvard University
- Daniele Oriti, Ludwig-Maximilians-Universität München
- Naritaka Oshita, Perimeter Institute
- Eran Palti, Max Planck Institute for Physics
- Qiaoyin Pan, Perimeter Institute
- Martin Pauly, Heidelberg University
- Sylvie Paycha, University of Potsdam
- Gustavo Pazzini de Brito, Brazilian Center for Research in Physics
- Roberto Percacci, SISSA
- Antonio Pereira, Fluminense Federal University
- Włodzimierz Piechocki, National Centre for Nuclear Research
- Alessia Platania, Heidelberg University
- Axel Polaczek, University of Sheffield
- Daniele Pranzetti, Perimeter Institute
- Jorge Pullin, Louisiana State University
- Pratik Rath, University of Califronia, Berkeley
- Manuel Reichert, CP3-Origins University of Southern Denmark
- Katarzyna Rejzner, University of YKatarzynaork
- Chris Ripken, Johannes Gutenberg-University Mainz
- Vincent Rivasseau, Université Paris-Saclay
- Germain Rousseaux, University of Poitiers
- Shan-Ming Ruan, Perimeter Institute
- Guilherme Sadovski, Okinawa Institute of Science and Technology
- Mustafa Saeed, University of New Brunswick
- Robert Santacruz, University of New Brunswick
- Susanne Schander, University of Erlangen
- Marc Schiffer, Heidelberg University
- Marc Schneider, Pennsylvania State University
- Arvin Shahbazi-Moghaddam, University of California, Berkeley
- Vasudev Shyam, Perimeter Institute
- José Diogo Simão, Friedrich-Schiller-Universität Jena
- Ashmeet Singh, California Institute of Technology
- Tejinder Pal Singh, Tata Institute of Fundamental Research
- Lee Smolin, Perimeter Institute
- Thomas Sotiriou, University of Nottingham
- Antony Speranza, Perimeter Institute
- Simone Speziale, Centre de Physique Théorique
- Sebastian Steinhaus, Friedrich-Schiller-Universität Jena
- Christian Steinwachs, University of Freiburg
- Vincent Su, University of California, Berekely
- Tadashi Takayanagi, Yukawa Institute for Theoretical Physics
- Johannes Thürigen, University of Münster
- Jessica Thomas, American Physical Society
- Tomasz Trzesniewski, Jagiellonian University
- Deepak Vaid, National Institute of Technology Karnataka
- Mark van Raamsdonk, University of British Columbia
- Manus Visser, University of Geneva
- Matthew Walhout, John Templeton Foundation
- Jinzhao Wang, ETH Zurich
- Yixu Wang, University of Maryland
- Yoshiyuki Watabiki, Tokyo Institute of Technology
- Wolfgang Wieland, Perimeter Institute
- Edward Wilson-Ewing, University of New Brunswick
- Michael Florian Wondrak, Goethe University Frankfurt
- Gabriel Wong, Fudan University
- Yigit Yargic, Perimeter Institute
- Cedric Yu, New York University
- Yasaman Yazdi, Imperial College London
- Jose A. Zapata, Universidad Nacional Autonoma de Mexico
- Yun-Long Zhang, Yukawa Institute for Theoretical Physics
Monday, July 13, 2020
Time |
Event |
Location |
8:30 – 9:20am |
Meet and Greet |
Virtual |
9:20 – 9:30am |
Bianca Dittrich, Perimeter Institute |
Virtual |
9:30 – 10:30am |
Hermann Nicolai, Albert Einstein Institute |
Virtual |
10:30 – 11:00am |
Break |
Virtual |
11:00 – 12:00pm |
Poster Session |
Virtual |
12:00 – 12:30pm |
Break |
Virtual |
12:30 – 1:15pm |
Alejandro Perez, Centre de Physique Theorique de Luminy |
Virtual |
1:15 – 2:00pm |
Daniel Harlow, Massachusetts Institute of Technology |
Virtual |
2:00 - 3:00pm |
Hang Out/Collaboration Sessions |
Virtual |
Tuesday, July 14, 2020
Time |
Event |
Location |
8:00 - 9:00am |
Hang Out/Collaboration Sessions |
Virtual |
9:00 – 9:45am |
Herman Verlinde, Princeton University |
Virtual |
9:45 – 10:30am |
Aron Wall, University of Cambridge |
Virtual |
10:30 – 11:00am |
Break |
Virtual |
11:00 – 11:45am |
Frank Saueressig, Radboud University Nijmegen |
Virtual |
11:45 – 12:30pm |
Renate Loll, Radboud University Nijmegen |
Virtual |
12:30 – 1:00pm |
Break |
Virtual |
1:00 – 2:00pm |
Parallel Discussion Session |
Virtual |
1:00 – 2:00pm |
Parallel Discussion Session |
Virtual |
1:00 – 2:00pm |
Parallel Discussion Session |
Virtual |
1:00 – 2:00pm |
Parallel Discussion Session |
Virtual |
2:00 - 3:00pm |
Hang Out/Collaboration Sessions |
Virtual |
Wednesday, July 15, 2020
Time |
Event |
Location |
8:00 - 9:00am |
Hang Out/Collaboration Sessions |
Virtual |
9:00 – 9:45am |
Sumati Surya, Raman Research Institute |
Virtual |
9:45 – 10:30am |
Silke Weinfurtner, Nottingham University |
Virtual |
10:30 – 11:00am |
Break |
Virtual |
11:00 – 12:00pm |
Parallel Discussion Session |
Virtual |
11:00 – 12:00pm |
Parallel Discussion Session |
Virtual |
11:00 – 12:00pm |
Parallel Discussion Session |
Virtual |
11:00 – 12:00pm |
Parallel Discussion Session |
Virtual |
12:00 – 12:30pm |
Break |
Virtual |
12:30 – 1:15pm |
Clifford Cheung, California Institute of Technology |
Virtual |
1:15 – 2:00pm |
Steve Giddings, University of California, Santa Barbara |
Virtual |
2:00 - 3:00pm |
Hang Out/Collaboration Sessions |
Virtual |
Thursday, July 16, 2020
Time |
Event |
Location |
8:00 - 9:00am EDT |
Hang Out/Collaboration Sessions | Virtual |
9:00 – 10:00am |
Parallel Discussion Session |
Virtual |
9:00 – 10:00am |
Parallel Discussion Session |
Virtual |
9:00 – 10:00am |
Parallel Discussion Session |
Virtual |
9:00 – 10:00am |
Parallel Discussion Session |
Virtual |
10:00 – 10:30am |
Break |
Virtual |
10:30 – 11:15am |
Mairi Sakellariadou, King's College London |
Virtual |
11:15 – 12:00pm |
Netta Engelhardt, Massachusetts Institute of Technology |
Virtual |
12:00 – 12:30pm |
Break |
Virtual |
12:30 – 1:15pm |
Monica Pate, Harvard University |
Virtual |
1:15 – 2:00pm |
Henry Maxfield, University of California, Santa Barbara |
Virtual |
2:30 - 3:00pm EDT |
Cocktails | Virtual |
3:00 - 5:00pm EDT |
Dinner | Virtual |
Friday, July 17, 2020
Time |
Event |
Location |
8:00 - 9:00am |
Hang Out/Collaboration Sessions |
Virtual |
9:00 – 9:20am |
Lin-Qing Chen, Okinawa Institute of Science and Technology |
Virtual |
9:20 – 9:40am |
Christoph Minz, University of York |
Virtual |
9:40 – 10:00am |
Manuel Reichert, CP3-Origins University of Southern Denmark |
Virtual |
10:00 – 10:30am |
Break |
Virtual |
10:30 – 11:15am |
Sylvain Carrozza, Perimeter Institute |
Virtual |
11:15 – 11:45am |
Break |
Virtual |
11:45 – 12:45pm |
Parallel Discussion Session |
Virtual |
11:45 – 12:45pm |
Parallel Discussion Session |
Virtual |
11:45 – 12:45pm |
Parallel Discussion Session |
Virtual |
11:45 – 12:45pm |
Parallel Discussion Session |
Virtual |
12:45 – 1:00pm |
Break |
Virtual |
1:00 – 1:45pm |
Ted Jacobson, University of Maryland |
Virtual |
1:45 – 2:00pm |
Closing remarks, announcement from organizers |
Virtual |
2:00 - 3:00pm |
Hang Out/Collaboration Sessions |
Virtual |
Sylvain Carrozza, Perimeter Institute
Random tensors, melonic theories and quantum gravity
I will present a brief review of large-N tensor models and their applications in quantum gravity. On the one hand, they provide a general platform to investigate random geometry in an arbitrary number of dimensions, in analogy with the matrix models approach to two-dimensional quantum gravity. Previously known universality classes of random geometries have been identified in this context, with continuous random trees acting as strong attractors. On the other hand, the same combinatorial structure supports a generic family of large-N quantum theories, collectively known as melonic theories. Being largely solvable, they have opened a new window into strongly-coupled quantum theory, and via holography, into quantum gravity. Prime examples are provided by the SYK model and generalizations, which capture essential features of Jackiw-Teitelboim gravity.
Clifford Cheung, California Institute of Technology
From Gluon Scattering to Black Hole Orbits
The study of scattering amplitudes has uncovered extraordinary dualities linking real-world particles such as gravitons, gluons, and pions. We discuss how these developments have been amalgamated with classic tools from effective field theory to derive new results relevant to the search for gravitational waves at LIGO. This approach has produced now state-of-the-art results on conservative orbital dynamics of binary black holes in the post-Minkowskian expansion. We also comment on recent work extending this framework to include tidal effects and spin.
Steve Giddings, University of California, Santa Barbara
Mathematical structure of quantum gravity
A quantum theory of gravity is expected to be described by a Hilbert space endowed with additional mathematical structure appropriate for describing gravitational physics. I discuss aspects of this structure that can be inferred perturbatively, along with connections to arguments for holography and nonperturbative questions.
Daniel Harlow, Massachusetts Institute of Technology
Lessons for quantum gravity from quantum information theory
Gravity is unique among the other forces in that within general relativity we are able to do calculations which, when properly interpreted, give us information about non-perturbative quantum gravity. A classic example is Bekenstein and Hawking's calculation of the entropy of a black hole, and a more recent example is the calculation of the ``Page curve'' for certain evaporating black holes. A common feature of both of these calculations is that they compute entropies without using von Neumann's formula S=-Tr(\rho \log \rho). In this strange situation where we are able to compute entropies without understanding the details of the states for which they are the entropy, quantum information theory is a powerful tool that lets us extract information about those states. In this talk I'll review aspects of these developments, emphasizing in particular the role of quantum extremal surfaces and quantum error correction.
Ted Jacobson, University of Maryland
Reflections on quantum gravity in 2020
Renate Loll, Radboud University Nijmegen
The Remarkable Roundness of the Quantum Universe
It has taken several decades of exploring statistical models of quantum gravity (aka nonperturbative gravitational path integrals) to understand how diffeomorphism-invariance, unitarity and the presence of a causal structure can be simultaneously accounted for in a lattice gravity framework. Causal Dynamical Triangulations (CDT) incorporates all of these features and provides a toolbox for extracting quantitative results from a first-principles quantum formulation, with very few free parameters. Recently, we have introduced the "quantum Ricci curvature", an observable that --somewhat remarkably-- remains meaningful in a maximally nonclassical, Planckian regime. Measuring this curvature in fully-fledged 4D quantum gravity, we have discovered exciting evidence that the quantum universe dynamically generated in CDT is compatible with a constantly curved de Sitter space.
Henry Maxfield, University of California, Santa Barbara
Black hole information, spacetime wormholes, and baby universes
Recent discoveries suggest that semiclassical gravity is more consistent with unitarity than previously believed. I will argue that it makes predictions for the measurements of asymptotic observers that are in complete accord with the idea that black holes are ordinary quantum systems, with states counted by the Bekenstein-Hawking formula. The argument uses the semiclassical gravitational path integral, incorporating newly discovered `spacetime wormhole' topologies. These new ideas revive an old paradigm, relating the information problem to the physics of baby universes.
Hermann Nicolai, Albert Einstein Institute
Approaches to Quantum Gravity: Key Achievements and Open Issues
This talk will provide an overview of current approaches to quantum gravity, with their respective merits and open problems (`comparative quantum gravity'). To this aim I will focus on some key issues that must be addressed by all approaches
Monica Pate, Harvard University
Soft modes in quantum gravity
I will review advances for gravity in asymptotically flat spacetimes arising from investigations into their structure in the infrared. The recently-discovered infinite-dimensional symmetries of the scattering problem is the central result underlying much of the progress. Key examples include symmetry-based explanations for the previously-observed universal nature of infrared phenomena including soft theorems and memory effects. Moreover, the appearance of a Virasoro symmetry among the symmetries of four-dimensional gravity has led to a proposal for holography in which the scattering amplitudes in quantum gravity are dual to correlation functions of a two-dimensional conformal theory. The other infinite-dimensional symmetry groups place additional non-trivial constraints on the dual theory.
Alejandro Perez, Centre de Physique Theorique de Luminy
Quantum gravity from the loop perspective
I will summarise the main achievements of loop quantum gravity and provide my view on the issues that I consider of central importance for present and future efforts.
Mairi Sakellariadou, King's College London
Quantum gravity signals in cosmology and gravitational waves
I will highlight cosmological consequences of models inspired from string theory or non-perturbative approaches to QG. In particular, I will address the initial singularity, inflation and the late-time accelerated expansion. I will then briefly discuss how recent gravitational waves data can provide a test for some QG models.
Frank Saueressig, Radboud University Nijmegen
Asymptotically Safe Amplitudes from the Quantum Effective Action
This talk will feature a brief introduction to the gravitational asymptotic safety program before reviewing the current status of the field. Motivated by recent developments, I will introduce the form factor formulation of the quantum effective action and explain how various quantum gravity programs can be embedded into this framework. Finally, I will discuss a novel gravity-matter model whose scattering amplitudes exhibit all features expected from Asymptotic Safety.
Sumati Surya, Raman Research Institute
The Quantum Dynamics of Causal Sets: Directions and Challenges
I will begin with a short review of causal set theory (CST) focusing on the features that distinguish it from other approaches to quantum gravity. Most striking is a characteristic non-locality due to the Lorentz non-violating Poisson-discreteness in the continuum approximation. The discrete causal structure is rich enough, however, to extract local continuum geometric information, with geometric and topological observables corresponding to order-invariants in the causal set.
These observables provide the necessary equipment in our search for a suitable quantum dynamics of causal sets. I will focus the rest of the talk on recent progress on this journey and the choices and challenges that lie ahead.
Aron Wall, University of Cambridge
Progress in horizon thermodynamics
I will review some developments in horizon thermodynamics from the past few years, highlighting especially the distinct notions of entropy that seem to apply to dynamically evolving black holes, and their extension from classical to semiclassical gravity.
Silke Weinfurtner, Nottingham University
Towards quantum simulators for fundamental physics
Analogue gravity summarises an effort to mimic physical processes that occur in the interplay between general relativity and field theory in a controlled laboratory environment. The aim is to provide insights in phenomena that would otherwise elude observation: when gravitational interactions are strong, when quantum effects are important, and/or on length scales that stretch far beyond the observable Universe. The most promising analogue gravity systems up-to-date are fluids, superfluids, superconducting circuits, ultra-cold atoms and optical systems. While deepening our understanding of the laboratory systems at hand, the long term vision of analogue gravity studies is to advance fundamental physics through interdisciplinary research, by establishing and nurturing a new culture of collaboration between the various communities involved. I will discuss recent efforts to explore the quantum origin of the Universe, accelerated observer radiation, and rotating black hole physics in the laboratory.
Angel Ballesteros, Universidad de Burgos
Presentation: audioBallesteros.mp3
Poster:
Luca Buoninfante, Tokyo Institute of Technology
Presentation: video-poster-Buoninfante_QG2020.mp4
Poster:
Alicia Castro, Radboud University Nijmegen
Presentation: https://youtu.be/WpioE3_WHy0
Poster:
Lin-Qing Chen, Okinawa Institute of Science and Technology
Presentation: https://www.youtube.com/watch?v=9ZWYS1vFtO4&feature=youtu.be
Poster:
Llorenç Espinosa-Portalés, Instituto de Física Teórica
Presentation: Video GQ2020 LEP 2.mp4
Poster:
Markus Fröb, Leipzig University
Presentation: Aufnahme_2.mp3
Poster:
Serena Giardino, University of Szczecin
Presentation: https://www.youtube.com/watch?v=buHcwbRloG8
Poster:
Cecilia Giavoni, Ludwig-Maximilians-Universitat Munchen
Presentation: CGiavoni_Quantum effects across dynamical horizons.mp4
Poster:
Hal Haggard, Bard College
Presentation: HaggardBlackHoleParticleQG2020 (1).mp4
Poster:
Aaron Held, Imperial College London
Presentation: qg2020-aaron.mp4
Poster:
Yannick Herfray, Université Libre de Bruxelles
Presentation: https://youtu.be/3LmAV2TgXZM
Poster:
Ding Jia, Perimeter Institute
Presentation: Ding Jia_trailer.mp4
Poster:
Josh Kirklin, University of Cambridge
Presentation: https://www.youtube.com/watch?v=YlulCyxjUw4&feature=youtu.be
Poster:
David Kubiznak, Perimeter Institute
Presentation: Taub-NUT_Kubiznak_recorded_compressed.mp4
Poster:
Folkert Kuipers, University of Sussex
Presentation: Recording_FJKuipers.mp3
Poster:
Pedro Jorge Martínez, Instituto de Física La Plata
Presentation: QG20 Pedro Jorge Martínez.mp4
Poster:
Alex May, University of British Columbia
Presentation: https://youtu.be/2WSKWOf2XZM
Poster:
Christoph Minz, University of York
Presentation: https://youtu.be/gW_ZAsc9kzM
Poster:
Javier Moreno, Pontifical Catholic University of Valparaíso
Presentation: PosterpresentationQG2020Moreno.mp4
Poster:
Daniele Oriti, Ludwig-Maximilians-Universität München
Presentation: Oriti-poster-presentation-QG2020.mp4
Poster:
Naritaka Oshita, Perimeter Institute
Presentation: Naritaka Oshita_movie.mp4
Poster:
Martin Pauly, Heidelberg University
Presentation: intro_martin_pauly.mp4
Poster:
Axel Polaczek, University of Sheffield
Presentation: https://apolaczek.postgrad.shef.ac.uk/3b5e070cf4.mp4
Poster: https://apolaczek.postgrad.shef.ac.uk/baa6457c98.png
Manuel Reichert, CP3-Origins University of Southern Denmark
Presentation: https://youtu.be/-j7f6lgYudE
Poster:
Chris Ripken, Johannes Gutenberg-University Mainz
Presentation: amplitude_blues.mp4
Poster:
Marc Schiffer, Heidelberg University
Presentation: https://youtu.be/rQCE3DnaWM8
Poster:
Marc Schneider, Pennsylvania State University
Presentation: MSchneiderClassvsQuantCompl.mp4
Poster:
Vincent Su, Perimeter Institute
Presentation: Su Hypergraph Presentation QG2020 Compresed.mp4
Poster:
Manus Visser, University of Geneva
Presentation: poster presentation QG2020 final - Manus Visser.mp4
Poster:
Michael Florian Wondrak, Goethe University Frankfurt
Presentation: Wondrak,_Michael_F-QG2020-T-duality_BH-reduced.mp4
Poster:
Cedric Yu, New York University
Presentation: Cedric_Yu_QG2020_Presentation.mp3
Poster:
Yun-Long Zhang, Yukawa Institute for Theoretical Physics
Presentation: https://youtu.be/skC0XDV-EEc
Poster:
Mathematical structure of quantum gravity
A quantum theory of gravity is expected to be described by a Hilbert space endowed with additional mathematical structure appropriate for describing gravitational physics. I discuss aspects of this structure that can be inferred perturbatively, along with connections to arguments for holography and nonperturbative questions.
From Gluon Scattering to Black Hole Orbits
The study of scattering amplitudes has uncovered extraordinary dualities linking real-world particles such as gravitons, gluons, and pions. We discuss how these developments have been amalgamated with classic tools from effective field theory to derive new results relevant to the search for gravitational waves at LIGO. This approach has produced now state-of-the-art results on conservative orbital dynamics of binary black holes in the post-Minkowskian expansion. We also comment on recent work extending this framework to include tidal effects and spin.
Towards quantum simulators for fundamental physics
Analogue gravity summarises an effort to mimic physical processes that occur in the interplay between general relativity and field theory in a controlled laboratory environment. The aim is to provide insights in phenomena that would otherwise elude observation: when gravitational interactions are strong, when quantum effects are important, and/or on length scales that stretch far beyond the observable Universe. The most promising analogue gravity systems up-to-date are fluids, superfluids, superconducting circuits, ultra-cold atoms and optical systems.
The Quantum Dynamics of Causal Sets: Directions and Challenges
I will begin with a short review of causal set theory (CST) focusing on the features that distinguish it from other approaches to quantum gravity. Most striking is a characteristic non-locality due to the Lorentz non-violating Poisson-discreteness in the continuum approximation. The discrete causal structure is rich enough, however, to extract local continuum geometric information, with geometric and topological observables corresponding to order-invariants in the causal set.
The Remarkable Roundness of the Quantum Universe
It has taken several decades of exploring statistical models of quantum gravity (aka nonperturbative gravitational path integrals) to understand how diffeomorphism-invariance, unitarity and the presence of a causal structure can be simultaneously accounted for in a lattice gravity framework. Causal Dynamical Triangulations (CDT) incorporates all of these features and provides a toolbox for extracting quantitative results from a first-principles quantum formulation, with very few free parameters.
Asymptotically Safe Amplitudes from the Quantum Effective Action
This talk will feature a brief introduction to the gravitational asymptotic safety program before reviewing the current status of the field. Motivated by recent developments, I will introduce the form factor formulation of the quantum effective action and explain how various quantum gravity programs can be embedded into this framework. Finally, I will discuss a novel gravity-matter model whose scattering amplitudes exhibit all features expected from Asymptotic Safety.
Progress in horizon thermodynamics
I will review some developments in horizon thermodynamics from the past few years, highlighting especially the distinct notions of entropy that seem to apply to dynamically evolving black holes, and their extension from classical to semiclassical gravity.
Understanding of QG from string theory
Lessons for quantum gravity from quantum information theory
Gravity is unique among the other forces in that within general relativity we are able to do calculations which, when properly interpreted, give us information about non-perturbative quantum gravity. A classic example is Bekenstein and Hawking's calculation of the entropy of a black hole, and a more recent example is the calculation of the ``Page curve'' for certain evaporating black holes. A common feature of both of these calculations is that they compute entropies without using von Neumann's formula S=-Tr(\rho \log \rho).
Quantum gravity from the loop perspective
I will summarise the main achievements of loop quantum gravity and provide my view on the issues that I consider of central importance for present and future efforts.
Pages
Scientific Organizers:
- Bianca Dittrich, Perimeter Institute
- William Donnelly, Perimeter Institute
- Astrid Eichhorn, University of Heidelberg & University of Southern Denmark
- Steffen Gielen, University of Sheffield
- Robert Myers, Perimeter Institute
Scientific Advisory Committee:
- Glenn Barnich, Université Libre de Bruxelles
- Emil Bjerrum-Bohr, Niels Bohr Institute
- Robert Brandenberger, McGill University
- Freddy Cachazo, Perimeter Institute
- Steve Carlip, University of California, Davis
- Fay Dowker, Imperial College London
- Laurent Freidel, Perimeter Institute
- Razvan Gurau, Centre national de la recherche scientifique
- Veronika Hubeny, University of California, Davis
- Ted Jacobson, University of Maryland
- Stefano Liberati, SISSA
- Etera Livine, École normale supérieure de Lyon
- Renate Loll, Radboud University Nijmegen
- Donald Marolf, University of California, Santa Barbara
- Hermann Nicolai, Albert Einstein Institute
- Daniele Oriti, Ludwig Maximilian University of Munich
- Roberto Percacci, SISSA
- Harvey Reall, University of Cambridge
- Mairi Sakellariadou, King's College London
- Frank Saueressig, Radboud University Nijmegen
- Ralf Scheutzhold, Helmholtz Zentrum, Dresden Rossendorf
- Lee Smolin, Perimeter Institute
- Andrew Strominger, Harvard University
- Tadashi Takayanagi, Yukawa Institute for Theoretical Physics
- Herman Verlinde, Institute for Advanced Study