Talks

10621 - 10632 of 16962 Results

Effective field theory of the unstable top (quark)

Alexander Penin University of Alberta

March 26, 2013

PIRSA:13030090

Particle Physics
Supersymmetric gauge theory and the Yangian - continued

Kevin Costello Perimeter Institute for Theoretical Physics

March 26, 2013

PIRSA:13030115
12/13 PSI - Explorations in Particle Theory Lecture 7

David Morrissey TRIUMF

March 26, 2013

PIRSA:13030073

Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 7

David Cory Institute for Quantum Computing (IQC)

March 26, 2013

PIRSA:13030062

Quantum Information
Wick's theorem for Matrix Product states

Robert Huebener Freie Universität Berlin

March 25, 2013

PIRSA:13030117

Quantum Information
Dissecting holography with higher spins

Xi Yin Harvard University

March 25, 2013

PIRSA:13030098

Quantum Fields and Strings
Supersymmetric gauge theory and the Yangian

Kevin Costello Perimeter Institute for Theoretical Physics

March 25, 2013

PIRSA:13030114
12/13 PSI - Explorations in Particle Theory Lecture 6

David Morrissey TRIUMF

March 25, 2013

PIRSA:13030072

Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 6

David Cory Institute for Quantum Computing (IQC)

March 25, 2013

PIRSA:13030061

Quantum Information
12/13 PSI - Explorations in Particle Theory Lecture 5

David Morrissey TRIUMF

March 22, 2013

PIRSA:13030069

Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 5

David Cory Institute for Quantum Computing (IQC)

March 22, 2013

PIRSA:13030058

Quantum Information
Advanced General Relativity - Lecture 18

Rafael Sorkin Perimeter Institute for Theoretical Physics

March 21, 2013

PIRSA:13030022

Effective field theory of the unstable top (quark)

Alexander Penin University of Alberta

March 26, 2013

PIRSA:13030090

Particle Physics

I introduce a new nonrelativistic effective field theory which systematically accounts for the finite lifetime effects in production of unstable particles.
The theory is applied to the threshold production of top quark-antiquark pairs.
Supersymmetric gauge theory and the Yangian - continued

Kevin Costello Perimeter Institute for Theoretical Physics

March 26, 2013

PIRSA:13030115

I'll explain a new connection between supersymmetric gauge theories and the Yangian. The main result is that a twisted, deformed version of the pure N=1 supersymmetric gauge theory is controlled by the Yangian, in the same way that Chern-Simons theory is controlled by the quantum group. This result is used to give an exact calculation, in perturbation theory, of the expectation value of a certain net of n+m Wilson operators in the deformed N=1 gauge theory. This expectation value coincides with the partition function of a spin-chain integrable lattice model on an n-by-m doubly-periodic lattice.
12/13 PSI - Explorations in Particle Theory Lecture 7

David Morrissey TRIUMF

March 26, 2013

PIRSA:13030073

Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 7

David Cory Institute for Quantum Computing (IQC)

March 26, 2013

PIRSA:13030062

Quantum Information
Wick's theorem for Matrix Product states

Robert Huebener Freie Universität Berlin

March 25, 2013

PIRSA:13030117

Quantum Information

Matrix product states and their continuous analogues are variational classes of states that capture quantum many-body systems or quantum fields with low entanglement; they are at the basis of the density-matrix renormalization group method and continuous variants thereof. In this talk we show that, generically, N-point functions of arbitrary operators in discrete and continuous translation invariant matrix product states are completely characterized by the corresponding two- and three-point functions. Aside from having important consequences for the structure of correlations in quantum states with low entanglement, this result provides a new way of reconstructing unknown states from correlation measurements e.g. for one-dimensional continuous systems of cold atoms. We argue that such a relation of correlation functions may help in devising perturbative approaches to interacting theories.

Joint work with Andrea Mari and Jens Eisert.
arXiv:1207.6537
Dissecting holography with higher spins

Xi Yin Harvard University

March 25, 2013

PIRSA:13030098

Quantum Fields and Strings

The holographic correspondence is a powerful duality between a quantum theory of gravity and a quantum gauge theory in one lower space-time dimension. Higher spin gravity theories, i.e. gravity theories that also contain (gauge) fields of spins greater than 2, play a special role in holography. I will explain consistent interacting higher spin gravity theories in anti-de Sitter space, their duality with gauged conformal vector models, and their connection to string theory.
Supersymmetric gauge theory and the Yangian

Kevin Costello Perimeter Institute for Theoretical Physics

March 25, 2013

PIRSA:13030114

I'll explain a new connection between supersymmetric gauge theories and the Yangian. The main result is that a twisted, deformed version of the pure N=1 supersymmetric gauge theory is controlled by the Yangian, in the same way that Chern-Simons theory is controlled by the quantum group. This result is used to give an exact calculation, in perturbation theory, of the expectation value of a certain net of n+m Wilson operators in the deformed N=1 gauge theory. This expectation value coincides with the partition function of a spin-chain integrable lattice model on an n-by-m doubly-periodic lattice.
12/13 PSI - Explorations in Particle Theory Lecture 6

David Morrissey TRIUMF

March 25, 2013

PIRSA:13030072

Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 6

David Cory Institute for Quantum Computing (IQC)

March 25, 2013

PIRSA:13030061

Quantum Information
12/13 PSI - Explorations in Particle Theory Lecture 5

David Morrissey TRIUMF

March 22, 2013

PIRSA:13030069

Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 5

David Cory Institute for Quantum Computing (IQC)

March 22, 2013

PIRSA:13030058

Quantum Information
Advanced General Relativity - Lecture 18

Rafael Sorkin Perimeter Institute for Theoretical Physics

March 21, 2013

PIRSA:13030022

Title	Date	Collection	Type	Info
Effective field theory of the unstable top (quark)	2013‑03‑26	Particle Physics	Scientific Series	View details
Supersymmetric gauge theory and the Yangian - continued	2013‑03‑26	Colloquium	Scientific Series	View details
12/13 PSI - Explorations in Particle Theory Lecture 7	2013‑03‑26	12/13 PSI - Explorations in Particle Theory	Course	View details
12/13 PSI - Explorations on Quantum Information Lecture 7	2013‑03‑26	12/13 PSI - Explorations on Quantum Information	Course	View details
Wick's theorem for Matrix Product states	2013‑03‑25	Perimeter Institute Quantum Discussions	Scientific Series	View details
Dissecting holography with higher spins	2013‑03‑25	Colloquium	Scientific Series	View details
Supersymmetric gauge theory and the Yangian	2013‑03‑25	Colloquium	Scientific Series	View details
12/13 PSI - Explorations in Particle Theory Lecture 6	2013‑03‑25	12/13 PSI - Explorations in Particle Theory	Course	View details
12/13 PSI - Explorations on Quantum Information Lecture 6	2013‑03‑25	12/13 PSI - Explorations on Quantum Information	Course	View details
12/13 PSI - Explorations in Particle Theory Lecture 5	2013‑03‑22	12/13 PSI - Explorations in Particle Theory	Course	View details
12/13 PSI - Explorations on Quantum Information Lecture 5	2013‑03‑22	12/13 PSI - Explorations on Quantum Information	Course	View details
Advanced General Relativity - Lecture 18	2013‑03‑21	Elements of General Relativity	Course	View details

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