Talks

11833 - 11844 of 20132 Results

Exact results in supersymmetric gauge theories in various dimensions

Sara Pasquetti University of Milan

March 19, 2014

PIRSA:14030084

High Energy Physics
13/14 PSI - Explorations in String Theory - Lecture 3

Andrei Starinets University of Oxford

March 19, 2014

PIRSA:14030061
13/14 PSI - Explorations in Condensed Matter - Lecture 3

Guifre Vidal Alphabet (United States)

March 19, 2014

PIRSA:14040024
13/14 PSI - Explorations in Quantum Information - Lecture 3

David Cory Institute for Quantum Computing (IQC)

March 19, 2014

PIRSA:14030031
Introduction to Quantum Field Theory for Cosmology - Lecture 19

Achim Kempf University of Waterloo

March 18, 2014

PIRSA:14030001
A histories perpective on bounding quantum correlations

Joe Henson BNP Paribas Asset Management London

March 18, 2014

PIRSA:14030111

Quantum Physics
Before the Bang

Raman Sundrum University of Maryland, College Park

March 18, 2014

PIRSA:14030113

High Energy Physics
13/14 PSI - Explorations in String Theory - Lecture 2

Andrei Starinets University of Oxford

March 18, 2014

PIRSA:14030060
Inflation After Planck

March 18, 2014

PIRSA:14030116

Astrophysics
13/14 PSI - Explorations in Condensed Matter - Lecture 2

Guifre Vidal Alphabet (United States)

March 18, 2014

PIRSA:14040023
13/14 PSI - Explorations in Quantum Information - Lecture 2

David Cory Institute for Quantum Computing (IQC)

March 18, 2014

PIRSA:14030030
Seeing is Believing: Direct Observation of a General Quantum State

Jeff Lundeen University of Ottawa

March 17, 2014

PIRSA:14030110

Quantum Physics

Exact results in supersymmetric gauge theories in various dimensions

Sara Pasquetti University of Milan

March 19, 2014

PIRSA:14030084

High Energy Physics

One of the central challenges in theoretical physics is to develop non-perturbative methods to describe quantitatively the dynamics of strongly coupled quantum fields. Much progress in this direction has been made for theories with a higher degree of symmetry, such as conformal symmetry or supersymmetry. In recent years the method of localisation has allowed to obtain a great deal of exact results for supersymmetric gauge theories in various dimensions which has led to the discovery of new surprising correspondences such as the celebrated Alday-Gaiotto-Tachikawa correspondence. I will review some recent results which indicate that partition functions of supersymmetric theories formulated on compact manifolds can be expressed in terms of a small set of fundamental building blocks.
13/14 PSI - Explorations in String Theory - Lecture 3

Andrei Starinets University of Oxford

March 19, 2014

PIRSA:14030061
13/14 PSI - Explorations in Condensed Matter - Lecture 3

Guifre Vidal Alphabet (United States)

March 19, 2014

PIRSA:14040024
13/14 PSI - Explorations in Quantum Information - Lecture 3

David Cory Institute for Quantum Computing (IQC)

March 19, 2014

PIRSA:14030031
Introduction to Quantum Field Theory for Cosmology - Lecture 19

Achim Kempf University of Waterloo

March 18, 2014

PIRSA:14030001
A histories perpective on bounding quantum correlations

Joe Henson BNP Paribas Asset Management London

March 18, 2014

PIRSA:14030111

Quantum Physics

There has recently been much interest in finding simple principles that explain the particular sets of experimental probabilities that are possible with quantum mechanics in Bell-type experiments. In the quantum gravity community, similar questions had been raised, about whether a certain generalisation of quantum mechanics allowed more than quantum mechanics in this regard. We now bring these two strands of work together to see what can be learned on both sides.
Before the Bang

Raman Sundrum University of Maryland, College Park

March 18, 2014

PIRSA:14030113

High Energy Physics

The simplest black hole solution in asymptotic AdS spacetime, the eternal 3-dimensional BTZ black hole, is studied from the viewpoint of AdS/CFT duality. We identify a class of non-local correlators on the CFT side that allow us to generalize the notion of quantum gravity "S-matrix" to scattering inside the horizon. Since the interior of the horizon is a cosmological spacetime with a big bang/crunch-like singularity, our construction can be interpreted as identifying generally coordinate invariant observables of quantum gravity in a simple cosmology. We show in a certain precise sense, that these holographic observables lie "before the big bang" in a region of spacetime containing closed timelike curves. A central tool in our analysis is the realization of BTZ as a quotient of 3-dimensional AdS.
13/14 PSI - Explorations in String Theory - Lecture 2

Andrei Starinets University of Oxford

March 18, 2014

PIRSA:14030060
Inflation After Planck

March 18, 2014

PIRSA:14030116

Astrophysics

The Planck satellite measurement of the cosmic microwave background has provided spectacular confirmation of the predictions of inflationary cosmology, putting inflation on a firm footing as the leading theory of the very early universe. I will discuss the implications of Planck for the simplest canonical single-field inflation models, which are favored by the data. Then I will discuss the most general question: How strong is the case that inflation is the "right" theory of the early universe?
13/14 PSI - Explorations in Condensed Matter - Lecture 2

Guifre Vidal Alphabet (United States)

March 18, 2014

PIRSA:14040023
13/14 PSI - Explorations in Quantum Information - Lecture 2

David Cory Institute for Quantum Computing (IQC)

March 18, 2014

PIRSA:14030030
Seeing is Believing: Direct Observation of a General Quantum State

Jeff Lundeen University of Ottawa

March 17, 2014

PIRSA:14030110

Quantum Physics

Central to quantum theory, the wavefunction is a complex distribution associated with a quantum system. Despite its fundamental role, it is typically introduced as an abstract element of the theory with no explicit definition. Rather, physicists come to a working understanding of it through its use to calculate measurement outcome probabilities through the Born Rule. Tomographic methods can reconstruct the wavefunction from measured probabilities. In contrast, I present a method to directly measure the wavefunction so that its real and imaginary components appear straight on our measurement apparatus. I will also present new work extending this concept to mixed quantum states. This extension directly measures a little-known proposal by Dirac for a classical analog to a quantum operator. Furthermore, it reveals that our direct measurement is a rigorous example of a quasi-probability phase-space (i.e. x,p) distribution that is closely related to the Q, P, and Wigner functions. Our direct measurement method gives the quantum state a plain and general meaning in terms of a specific set of simple operations in the lab.

Title	Date	Collection	Type	Info
Exact results in supersymmetric gauge theories in various dimensions	2014‑03‑19	Colloquium	Scientific Series	View details
13/14 PSI - Explorations in String Theory - Lecture 3	2014‑03‑19	13/14 PSI - Explorations in String Theory	Course	View details
13/14 PSI - Explorations in Condensed Matter - Lecture 3	2014‑03‑19	13/14 PSI - Explorations in Condensed Matter	Course	View details
13/14 PSI - Explorations in Quantum Information - Lecture 3	2014‑03‑19	13/14 PSI - Explorations in Quantum Information	Course	View details
Introduction to Quantum Field Theory for Cosmology - Lecture 19	2014‑03‑18	Quantum Field Theory for Cosmology - 2014	Course	View details
A histories perpective on bounding quantum correlations	2014‑03‑18	Quantum Foundations	Scientific Series	View details
Before the Bang	2014‑03‑18	Particle Physics	Scientific Series	View details
13/14 PSI - Explorations in String Theory - Lecture 2	2014‑03‑18	13/14 PSI - Explorations in String Theory	Course	View details
Inflation After Planck	2014‑03‑18	Cosmology and Gravitation	Scientific Series	View details
13/14 PSI - Explorations in Condensed Matter - Lecture 2	2014‑03‑18	13/14 PSI - Explorations in Condensed Matter	Course	View details
13/14 PSI - Explorations in Quantum Information - Lecture 2	2014‑03‑18	13/14 PSI - Explorations in Quantum Information	Course	View details
Seeing is Believing: Direct Observation of a General Quantum State	2014‑03‑17	Quantum Foundations	Scientific Series	View details

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Format results

Exact results in supersymmetric gauge theories in various dimensions

13/14 PSI - Explorations in String Theory - Lecture 3

13/14 PSI - Explorations in Condensed Matter - Lecture 3

13/14 PSI - Explorations in Quantum Information - Lecture 3

Introduction to Quantum Field Theory for Cosmology - Lecture 19

A histories perpective on bounding quantum correlations

Before the Bang

13/14 PSI - Explorations in String Theory - Lecture 2

Inflation After Planck

13/14 PSI - Explorations in Condensed Matter - Lecture 2

13/14 PSI - Explorations in Quantum Information - Lecture 2

Seeing is Believing: Direct Observation of a General Quantum State

Exact results in supersymmetric gauge theories in various dimensions

13/14 PSI - Explorations in String Theory - Lecture 3

13/14 PSI - Explorations in Condensed Matter - Lecture 3

13/14 PSI - Explorations in Quantum Information - Lecture 3

Introduction to Quantum Field Theory for Cosmology - Lecture 19

A histories perpective on bounding quantum correlations

Before the Bang

13/14 PSI - Explorations in String Theory - Lecture 2

Inflation After Planck

13/14 PSI - Explorations in Condensed Matter - Lecture 2

13/14 PSI - Explorations in Quantum Information - Lecture 2

Seeing is Believing: Direct Observation of a General Quantum State