An algebra of proper observables at null infinity: Dirac brackets, Memory and Goldstone probes
Rodrigo Andrade E Silva - Perimeter Institute for Theoretical Physics
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Lessons learned from GW250114: a loud signal with no Love
Giada Santoro - University of Copenhagen
Lecture - Non-local quantum computation mini course
Alex May - Perimeter Institute for Theoretical Physics
Non-invertible symmetries on the lattice
Pranay Gorantla - Perimeter Institute for Theoretical Physics
Global Structure of Symmetries in Particle Physics
Seth Koren - University of Notre Dame
Resource Theory of Causal Influence and Knowledge about Causal Influence
Marina Maciel Ansanelli - Perimeter Institute for Theoretical Physics
Quantum-Classical Correspondence in Weakly Perturbed Integrable Systems
Meenu Kumari - National Research Council Canada (NRC)
Lecture - Non-local quantum computation mini-course
Alex May - Perimeter Institute for Theoretical Physics
A Non-Semisimple Categorical Symmetry on the Lattice
Matthew Yu - University of Oxford
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An algebra of proper observables at null infinity: Dirac brackets, Memory and Goldstone probes
Rodrigo Andrade E Silva - Perimeter Institute for Theoretical Physics
The gravitational memory problem is typically phrased in terms of the failure of constructing a (separable) Hilbert space for radiative gravitational modes at null infinity containing distinct memory states. There is, in a sense, a classical version of this problem: so far, there is no completely… -
Lessons learned from GW250114: a loud signal with no Love
Giada Santoro - University of Copenhagen
GW250114, with a signal-to-noise ratio of ∼80, enables the most precise single-event tests of strong-field gravity to date: setting the tightest constraints on deviations from general relativity, delivering the cleanest ringdown measurement yet, and placing stringent bounds on compact object… -
Lecture - Non-local quantum computation mini course
Alex May - Perimeter Institute for Theoretical Physics
Exact Matrix Product State for Model States in ideal Bands
Many-body interacting systems cannot generally be treated with analytical tools alone, making numerical methods essential for studying strongly correlated phases. In fractional quantum Hall systems, conformal field theory correlators provide a way to construct exact matrix product state…-
Non-invertible symmetries on the lattice
Pranay Gorantla - Perimeter Institute for Theoretical Physics
Non-invertible symmetries have received a lot of attention in the last few years, with nontrivial applications in both high energy physics and condensed matter physics. I will discuss exact realizations of non-invertible symmetries on the lattice. Specifically, I will present a tensor network… -
Global Structure of Symmetries in Particle Physics
Seth Koren - University of Notre Dame
As particle physicists we usually think about small fluctuations of fields, but the phenomenology of our theories can depend crucially on the global structure of the symmetries and the topology of field space. First I'll discuss an ambiguity in the Standard Model gauge group, whose different… 
Reaching diffraction-limited localization with coherent PTAs
Anna Tsai - CITA
Current pulsar timing array (PTA) analyses do not take full advantage of pulsar distance information, thereby missing out on improved angular resolution and on a potential factor-of-two gain in detection sensitivity for individual gravitational-wave (GW) sources. In this work, we investigate the…-
Resource Theory of Causal Influence and Knowledge about Causal Influence
Marina Maciel Ansanelli - Perimeter Institute for Theoretical Physics
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Quantum-Classical Correspondence in Weakly Perturbed Integrable Systems
Meenu Kumari - National Research Council Canada (NRC)
In classical systems, the Kolmogorov–Arnold–Moser (KAM) theorem establishes that resonant tori of integrable Hamiltonians are destroyed by any nonintegrable perturbation, whereas nonresonant tori are only deformed up to a finite value of the perturbation parameter. In this seminar, we explore a… -
Lecture - Non-local quantum computation mini-course
Alex May - Perimeter Institute for Theoretical Physics
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A Non-Semisimple Categorical Symmetry on the Lattice
Matthew Yu - University of Oxford
Semisimple categorical symmetries, and their physical implications have been studied in great detail in the continuum and on the lattice. In particular, the nice properties of semisimple categories allows one to construct hamiltonians which enjoy this symmetry, and study its symmetric gapped phases…