Talks

9469 - 9480 of 16763 Results

Introduction to Quantum Field Theory for Cosmology - Lecture 22

Achim Kempf University of Waterloo

March 27, 2014

PIRSA:14030006
Possible Astrophysical Observables of Quantum Gravity Effects near Black Holes

Ue-Li Pen Canadian Institute for Theoretical Astrophysics (CITA)

March 27, 2014

PIRSA:14030115

Quantum Gravity
13/14 PSI - Explorations in Quantum Information - Lecture 10

David Cory Institute for Quantum Computing (IQC)

March 27, 2014

PIRSA:14030040
Bungee jumping of black holes in AdS universe

March 27, 2014

PIRSA:14030108

Strong Gravity
13/14 PSI - Explorations in String Theory - Lecture 9

Andrei Starinets University of Oxford

March 27, 2014

PIRSA:14030069
13/14 PSI - Explorations in Condensed Matter - Lecture 9

Guifre Vidal Alphabet (United States)

March 27, 2014

PIRSA:14040032
13/14 PSI - Explorations in Quantum Information - Lecture 9

David Cory Institute for Quantum Computing (IQC)

March 27, 2014

PIRSA:14030039
The invasion of physics by information theory

Robert Spekkens Perimeter Institute for Theoretical Physics

March 26, 2014

PIRSA:14030085

Quantum Foundations
GeV Gamma-Rays from the Central Milky Way and the Case for Annihilating Dark Matter

Tracy Slatyer Massachusetts Institute of Technology (MIT) - Department of Physics

March 26, 2014

PIRSA:14030120

Particle Physics
13/14 PSI - Explorations in String Theory - Lecture 8

Andrei Starinets University of Oxford

March 26, 2014

PIRSA:14030068
13/14 PSI - Explorations in Condensed Matter - Lecture 8

Guifre Vidal Alphabet (United States)

March 26, 2014

PIRSA:14040031
13/14 PSI - Explorations in Quantum Information - Lecture 8

David Cory Institute for Quantum Computing (IQC)

March 26, 2014

PIRSA:14030038

Introduction to Quantum Field Theory for Cosmology - Lecture 22

Achim Kempf University of Waterloo

March 27, 2014

PIRSA:14030006
Possible Astrophysical Observables of Quantum Gravity Effects near Black Holes

Ue-Li Pen Canadian Institute for Theoretical Astrophysics (CITA)

March 27, 2014

PIRSA:14030115

Quantum Gravity

Recent implications of results from quantum information theory applied to black holes has led to the confusing conclusions that requires either abandoning the equivalence principle (e.g. the firewall picture), or the no-hair theorem (e.g. the fuzzball picture), or even more unpalatable options. The recent discovery of a pulsar orbiting a black hole opens up new possibilities for tests of theories of gravity. We examine possible observational effects of semiclassical quantum gravity in the vicinity of black holes, as probed by pulsars and event horizon telescope imaging of flares. Pulsar radiation is observable at wavelengths only two orders of magnitude shorter than the Hawking radiation, so precision interferometry of lensed pulsar images may shed light on the quantum gravitational processes and interaction of Hawking radiation with the spacetime near the black hole. This paper discusses the impact on the pulsar radiation interference pattern, which is observable through the modulation index in the foreseeable future, and discusses a possible classical limit of BHC.
13/14 PSI - Explorations in Quantum Information - Lecture 10

David Cory Institute for Quantum Computing (IQC)

March 27, 2014

PIRSA:14030040
Bungee jumping of black holes in AdS universe

March 27, 2014

PIRSA:14030108

Strong Gravity

C-metric describes uniformly accelerated black holes. We will review a global structure of these solutions especially in Lambda<0 context. It turns out that for an acceleration larger than the cosmological one the metric describes pairs of black holes "bungee jumping" into spacetime from AdS infinity.
13/14 PSI - Explorations in String Theory - Lecture 9

Andrei Starinets University of Oxford

March 27, 2014

PIRSA:14030069
13/14 PSI - Explorations in Condensed Matter - Lecture 9

Guifre Vidal Alphabet (United States)

March 27, 2014

PIRSA:14040032
13/14 PSI - Explorations in Quantum Information - Lecture 9

David Cory Institute for Quantum Computing (IQC)

March 27, 2014

PIRSA:14030039
The invasion of physics by information theory

Robert Spekkens Perimeter Institute for Theoretical Physics

March 26, 2014

PIRSA:14030085

Quantum Foundations

When we think of a revolution in physics, we usually think of a physical theory that manages to overthrow its predecessor. There is another kind of revolution, however, that typically happens more slowly but that is often the key to achieving the first sort: it is the discovery of a novel perspective on an existing physical theory. The use of least-action principles, symmetry principles, and thermodynamic principles are good historical examples. It turns out that we can refine our understanding of many of these principles by characterizing certain properties of physical states as resources. I will discuss some of the highlights of two resource theories: the resource theory of asymmetry, which characterizes the relations among quantum states that break a symmetry; and the resource theory of athermality, which characterizes the relations among quantum states that deviate from thermal equilibrium. In particular, I will discuss how Noether's theorem does not capture all of the consequences of symmetries of the dynamics, and how the second law of thermodynamics does not capture all of the constraints on thermodynamic transitions. Finally, I will show that both asymmetry and athermality are informational resources, and that rehabilitated versions of Noether's theorem and the second law can both be understood as constraints on data processing. Considerations such as these---as well as evidence from other fronts of the invasion---make a compelling case for the revolutionary cause of reconceiving physics from an information-theoretic perspective.
GeV Gamma-Rays from the Central Milky Way and the Case for Annihilating Dark Matter

Tracy Slatyer Massachusetts Institute of Technology (MIT) - Department of Physics

March 26, 2014

PIRSA:14030120

Particle Physics

Past studies have identified a spatially extended excess of ~1-3 GeV gamma rays from the Galactic Center and inner Galaxy, consistent with the emission expected from annihilating thermal relic dark matter. I will describe recent improvements in the characterization of this signal, which demonstrate that it is spherically symmetric, centered on the Galactic Center, and with a spatial profile consistent with annihilation from a cusped NFW profile. The excess can be detected out to 10 degrees from the Galactic Center, which poses challenges for a millisecond pulsar origin; I will discuss the implications of a dark matter interpretation.
13/14 PSI - Explorations in String Theory - Lecture 8

Andrei Starinets University of Oxford

March 26, 2014

PIRSA:14030068
13/14 PSI - Explorations in Condensed Matter - Lecture 8

Guifre Vidal Alphabet (United States)

March 26, 2014

PIRSA:14040031
13/14 PSI - Explorations in Quantum Information - Lecture 8

David Cory Institute for Quantum Computing (IQC)

March 26, 2014

PIRSA:14030038

Title	Date	Collection	Type	Info
Introduction to Quantum Field Theory for Cosmology - Lecture 22	2014‑03‑27	Quantum Field Theory for Cosmology - 2014	Course	View details
Possible Astrophysical Observables of Quantum Gravity Effects near Black Holes	2014‑03‑27	Quantum Gravity	Scientific Series	View details
13/14 PSI - Explorations in Quantum Information - Lecture 10	2014‑03‑27	13/14 PSI - Explorations in Quantum Information	Course	View details
Bungee jumping of black holes in AdS universe	2014‑03‑27	Strong Gravity	Scientific Series	View details
13/14 PSI - Explorations in String Theory - Lecture 9	2014‑03‑27	13/14 PSI - Explorations in String Theory	Course	View details
13/14 PSI - Explorations in Condensed Matter - Lecture 9	2014‑03‑27	13/14 PSI - Explorations in Condensed Matter	Course	View details
13/14 PSI - Explorations in Quantum Information - Lecture 9	2014‑03‑27	13/14 PSI - Explorations in Quantum Information	Course	View details
The invasion of physics by information theory	2014‑03‑26	Colloquium	Scientific Series	View details
GeV Gamma-Rays from the Central Milky Way and the Case for Annihilating Dark Matter	2014‑03‑26	Particle Physics	Scientific Series	View details
13/14 PSI - Explorations in String Theory - Lecture 8	2014‑03‑26	13/14 PSI - Explorations in String Theory	Course	View details
13/14 PSI - Explorations in Condensed Matter - Lecture 8	2014‑03‑26	13/14 PSI - Explorations in Condensed Matter	Course	View details
13/14 PSI - Explorations in Quantum Information - Lecture 8	2014‑03‑26	13/14 PSI - Explorations in Quantum Information	Course	View details

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