Condensed matter physics is the branch of physics that studies systems of very large numbers of particles in a condensed state, like solids or liquids. Condensed matter physics wants to answer questions like: why is a material magnetic? Or why is it insulating or conducting? Or new, exciting questions like: what materials are good to make a reliable quantum computer? Can we describe gravity as the behavior of a material? The behavior of a system with many particles is very different from that of its individual particles. We say that the laws of many body physics are emergent or collective. Emergence explains the beauty of physics laws.
Format results

2 talksCollection NumberC20010
Talk

PSI 2019/2020  Quantum Matter Part 2  Lecture 1
University of Naples Federico II 
PSI 2019/2020  Quantum Matter Part 2  Lecture 2
University of Naples Federico II


PSI 2019/2020  Quantum Matter Part 1
18 talksCollection NumberC20003Talk

PSI 2019/2020  Quantum Matter Part 1  Lecture 1
University of Naples Federico II 
PSI 2019/2020  Quantum Matter Part 1  Lecture 2
University of Naples Federico II 
PSI 2019/2020  Quantum Matter Part 1  Lecture 3
University of Naples Federico II 
PSI 2019/2020  Quantum Matter Part 1  Lecture 4
University of Naples Federico II 
PSI 2019/2020  Quantum Matter Part 1  Lecture 5
University of Naples Federico II 
PSI 2019/2020  Quantum Matter Part 1  Lecture 6
University of Naples Federico II 
PSI 2019/2020  Quantum Matter Part 1  Lecture 7
University of Naples Federico II 
PSI 2019/2020  Quantum Matter Part 1  Lecture 8
University of Naples Federico II


PSI 2019/2020  Condensed Matter (Wang)
16 talksCollection NumberC19043Talk

PSI 2019/2020  Condensed Matter (Wang)  Lecture 1
Perimeter Institute for Theoretical Physics 
PSI 2019/2020  Condensed Matter (Wang)  Lecture 2
Perimeter Institute for Theoretical Physics 
PSI 2019/2020  Condensed Matter (Wang)  Lecture 3
Perimeter Institute for Theoretical Physics 
PSI 2019/2020  Condensed Matter (Wang)  Lecture 4
Perimeter Institute for Theoretical Physics 
PSI 2019/2020  Condensed Matter (Wang)  Lecture 5
Perimeter Institute for Theoretical Physics 
PSI 2019/2020  Condensed Matter (Wang)  Lecture 6
Perimeter Institute for Theoretical Physics 
PSI 2019/2020  Condensed Matter (Wang)  Lecture 7
Perimeter Institute for Theoretical Physics 
PSI 2019/2020  Condensed Matter (Wang)  Lecture 8
Perimeter Institute for Theoretical Physics


Boundaries and Defects in Quantum Field Theory
21 talksCollection NumberC19035Talk

Symmetries and Dualities of Abelian TQFTs
Perimeter Institute for Theoretical Physics 
TBD
Stony Brook University 
Universality at large transverse spin in defect CFTs
European Organization for Nuclear Research (CERN) 
Domain Walls in SuperQCD
SISSA International School for Advanced Studies 
Weyl Anomaly Induced Current and Holography
Sun Yatsen University 
Wilson line impurities, flows and entanglement entropy
Swansea University 
Anomalies in the Space of Coupling Constants
Institute for Advanced Study (IAS) 
Integrability of onepoint functions in AdS/dCFT with and without supersymmetry
University of Copenhagen


Machine Learning for Quantum Design
30 talksCollection NumberC19025Talk


Simulating Thermal and Quantum Fluctuations in Materials and Molecules
L'Ecole Polytechnique Federale de Lausanne (EPFL) 
How to use a Gaussian Boson Sampler to learn from graphstructured data
University of KwaZuluNatal 
Machine learning meets quantum physics
Tsinghua University 

Engineering Programmable Spin Interactions in a NearConcentric Cavity
Stanford University 
Alleviating the sign structure of quantum states
Flatiron Institute 
Navigating the quantum computing field as a high school student
The Knowledge Society


ManyBody States and Dynamics Workshop II
8 talksCollection NumberC19024Talk

Simulating an expanding universe on Google's Bristlecone
Alphabet (United States) 
Preparing Critical and Thermofield Double States on a Quantum Computer
Perimeter Institute for Theoretical Physics 
TensorNetwork: accelerating tensor network computations and improving the coding experience
California Institute of Technology 
Maximally sensitive sets of states
University of Maryland, College Park 
Quantum simulation of 2D and 3D spin models in a linear chain of ions
Institute for Quantum Computing (IQC) 
Polariton Graph Network
Institute for Quantum Computing (IQC) 

Quantum Simulation of Lattice Field Theories with Microwave Photons
Institute for Quantum Computing (IQC)


Quantum Matter: Emergence & Entanglement 3
24 talksCollection NumberC19021Talk

Theory of a Planckian metal with a remnant Fermi surface.
Harvard University 
Twisted foliated fracton order
California Institute of Technology 
Landau ordering and other phase transitions beyond the Landau paradigm
Massachusetts Institute of Technology (MIT)  Department of Physics 
QED and quantum magnetism in (2+1)d
Perimeter Institute for Theoretical Physics 

Shadow of complex fixed point: Approxmiate conformality of Q>4 Potts model
Perimeter Institute for Theoretical Physics 
On the relation between the magnitude and exponent of OTOCs
Harvard University 
Firewalls vs. Scrambling
Perimeter Institute for Theoretical Physics


Low Energy Challenges for High Energy Physicists 3
16 talksCollection NumberC18013Talk

Emergent Gravity From Relatively Local Hamiltonians
McMaster University 



Holographic Solids: Transverse Phonons and Elastic Response
International School for Advanced StudiesPIRSA:18060031 




PSI 2017/2018  Condensed Matter (Hamma)
15 talksCollection NumberC17044Talk

PSI 2017/2018  Condensed Matter  Lecture 1
University of Naples Federico II 
PSI 2017/2018  Condensed Matter  Lecture 2
University of Naples Federico II 
PSI 2017/2018  Condensed Matter  Lecture 3
University of Naples Federico II 
PSI 2017/2018  Condensed Matter  Lecture 4
University of Naples Federico II 
PSI 2017/2018  Condensed Matter  Lecture 5
University of Naples Federico II 

PSI 2017/2018  Condensed Matter  Lecture 7
University of Naples Federico II 
PSI 2017/2018  Condensed Matter  Lecture 8
University of Naples Federico II


PSI 2017/2018  Condensed Matter (Tiwari)
15 talksCollection NumberC17041Talk

PSI 2017/2018  Condensed Matter  Lecture 1
McGill University  Department of Physics 
PSI 2017/2018  Condensed Matter  Lecture 2
McGill University  Department of Physics 
PSI 2017/2018  Condensed Matter  Lecture 3
McGill University  Department of Physics 
PSI 2017/2018  Condensed Matter  Lecture 4
McGill University  Department of Physics 
PSI 2017/2018  Condensed Matter  Lecture 5
McGill University  Department of Physics 
PSI 2017/2018  Condensed Matter  Lecture 6
McGill University  Department of Physics 
PSI 2017/2018  Condensed Matter  Lecture 7
McGill University  Department of Physics 
PSI 2017/2018  Condensed Matter  Lecture 8
McGill University  Department of Physics


Talk

Semisimple Hopf algebras and fusion categories
Universidad de los Andes 
The Hopf C*algebraic quantum double models  symmetries beyond group theory
Freie Universität Berlin 
Modular categories and the Witt group
Radboud Universiteit Nijmegen 
Topological Quantum Computation
Texas A&M University 
Gapped phases of matter vs. Topological field theories
Perimeter Institute for Theoretical Physics 
An Introduction to Hopf Algebra Gauge Theory
University of ErlangenNuremberg 
Kitaev lattice models as a Hopf algebra gauge theory
University of ErlangenNuremberg 
Topological defects and highercategorical structures
Karlstad University


International Workshop on Quantum Spin Ice
20 talksCollection NumberC17022Talk

Microscopic aspects of insulating rareearth pyrochlore magnets
University of Toronto 
Lightning review on emergent quantum electrodynamics in quantum spin ice
University of Toronto 
The importance of defects and structural flexibility in the physics of quantum spin ices
Johns Hopkins University 
Quasiparticle breakdown in the quantum pyrochlore Yb2Ti2O7 in magnetic field
University of Oxford 
Lobed phase diagram of single crystalline Yb2Ti2O7 in [111] magnetic field
National Institute of Standards & Technology 
Experimental signatures of phase competition in quantum XY pyrochlores
McMaster University 

Living on the edge: multiphase competition in Yb2Ti2O7 and monopole crystal in Tb2Ti2O7
University of Bordeaux


PSI 2019/2020  Quantum Matter (Part 2)
2 talksCollection NumberC20010PSI 2019/2020  Quantum Matter (Part 2) 
PSI 2019/2020  Quantum Matter Part 1
18 talksCollection NumberC20003PSI 2019/2020  Quantum Matter Part 1 
PSI 2019/2020  Condensed Matter (Wang)
16 talksCollection NumberC19043PSI 2019/2020  Condensed Matter (Wang) 
Boundaries and Defects in Quantum Field Theory
21 talksCollection NumberC19035Boundaries and defects play central roles in quantum field theory (QFT) both as means to make contact with nature and as tools to constrain and understand QFT itself. Boundaries in QFT can be used to model impurities and also the finite extent of sample sizes while interfaces allow for different phases of matter to interact in a controllable way. More formally these structures shed light on the structure of QFT by providing new examples of dualities and renormalization group flows. Broadly speaking this meeting will focus on three areas: 1) formal and applied aspects of boundary and defect conformal field theory from anomalies and ctheorems to topological insulators 2) supersymmetry and duality from exact computations of new observables to the construction of new theories and 3) QFT in curved space and gravity from holographic computations of entanglement entropy to ideas in quantum information theory. Registration for this event is now open.

Machine Learning for Quantum Design
30 talksCollection NumberC19025Machine learning techniques are rapidly being adopted into the field of quantum manybody physics including condensed matter theory experiment and quantum information science. The steady increase in data being produced by highlycontrolled quantum experiments brings the potential of machine learning algorithms to the forefront of scientific advancement. Particularly exciting is the prospect of using machine learning for the discovery and design of quantum materials devices and computers. In order to make progress the field must address a number of fundamental questions related to the challenges of studying manybody quantum mechanics using classical computing algorithms and hardware. The goal of this conference is to bring together experts in computational physics machine learning and quantum information to make headway on a number of related topics including: Datadrive quantum state reconstruction Machine learning strategies for quantum error correction Neuralnetwork based wavefunctions Nearterm prospects for data from quantum devices Machine learning for quantum algorithm discovery Registration for this event is now closed

ManyBody States and Dynamics Workshop II
8 talksCollection NumberC19024On Thursday June 13 the Institute for Quantum Computing (IQC) and Perimeter Institute for Theoretical Physics (PI) will participate in the oneday ManyBody States and Dynamics Workshop II. The goal of the workshop is to describe ongoing efforts to experimentally realize quantum manybody states and dynamics and discuss interesting classes of states and dynamics that could be targeted. Experimentalists working on several platforms (such as photons atom and ion traps superconducting qubits excitonpolaritons or NMR) and theoreticians specialized in manybody theory (entanglement topological order gauge theories criticality chaos error correction holography) and numerical simulations (exact diagonalization Monte Carlo DMRG tensor networks) will meet for a morning workshop to identify and discuss common interests.

Quantum Matter: Emergence & Entanglement 3
24 talksCollection NumberC19021This third workshop of the Perimeter Institute series Emergence and Entanglement will center around four major frontiers in quantum matter research: (i) topological matter including recently discovered phases in three dimensions and new routes toward experimental realization (ii) critical states of matter especially interacting CFTs in 2+1 dimensions and dualities (iii) stateoftheart numerical approaches to tackle such manybody problems (e.g. DMRG MERA Monte Carlo) and (iv) quantum dynamics and thermalization.

Low Energy Challenges for High Energy Physicists 3
16 talksCollection NumberC18013Throughout the history of quantum field theory there has been a rich crosspollination between high energy and condensed matter physics. From the theory of renormalization to the consequences of spontaneous symmetry breaking this interaction has been an incredibly fruitful one. In the last decade there has been a strong resurgence of interest in condensed matter systems in the high energy theoretical physics community. Taking advantage of developments in conformal field theories the conformal bootstrap gauge/gravity and other type of dualities as well as effective field theory techniques high energy theorists with all kinds of specialist backgrounds are thinking about the diverse behavior exhibited in low energy physical systems. Recent developments also employed quantum field theory ideas to improve our understanding of condensed and quantum matter systems as for example Femi liquids strange metals or the behavior of topological defects in ultra cold atom gases. For certain questions such approaches present relevant advantages with respect to more traditional techniques. Moreover in recent years the interplay between high energy and condensed matter physics found new fuel in the search for light dark matter. Indeed theoretical analyses have recently shifted the attention towards model for subGeV dark matter. The condensed matter community has played a crucial role in the design of possible new materials and detectors that could allow the observation of such particles. The aim of this workshop is to bring together likeminded high energy theorists with appropriate condensed matter theorists and experimentalists to tackle some of the most interesting problems in modern physics. The format has been designed to allow for plenty of time for open discussion and interaction between the participants. This will reinvigorate existing collaborations as well as create new fruitful ones.

PSI 2017/2018  Condensed Matter (Hamma)
15 talksCollection NumberC17044PSI 2017/2018  Condensed Matter (Hamma) 
PSI 2017/2018  Condensed Matter (Tiwari)
15 talksCollection NumberC17041PSI 2017/2018  Condensed Matter (Tiwari) 
Hopf Algebras in Kitaev's Quantum Double Models: Mathematical Connections from Gauge Theory to Topological Quantum Computing and Categorical Quantum Mechanics
18 talksCollection NumberC17029The Kitaev quantum double models are a family of topologically ordered spin models originally proposed to exploit the novel condensed matter phenomenology of topological phases for faulttolerant quantum computation. Their physics is inherited from topological quantum field theories, while their underlying mathematical structure is based on a class of Hopf algebras. This structure is also seen across diverse fields of physics, and so allows connections to be made between the Kitaev models and topics as varied as quantum gauge theory and modified strong complementarity. This workshop will explore this shared mathematical structure and in so doing develop the connections between the fields of mathematical physics, quantum gravity, quantum information, condensed matter and quantum foundations.

International Workshop on Quantum Spin Ice
20 talksCollection NumberC17022International Workshop on Quantum Spin Ice