Talks

12829 - 12840 of 20131 Results

Getting the Most out of a Black Hole

Alexander Tchekhovskoy Princeton University

March 04, 2013

PIRSA:13030102

Astrophysics
12/13 PSI - Cosmology Review Lecture 10

Latham Boyle University of Edinburgh

March 04, 2013

PIRSA:13030041

Astrophysics
12/13 PSI - Quantum Information Review Lecture 10

Andrew Childs University of Waterloo

March 04, 2013

PIRSA:13030049

Quantum Physics
12/13 PSI - Beyond the Standard Model Lecture 10

Itay Yavin McMaster University

Natalia Toro Stanford University

March 04, 2013

PIRSA:13030033

High Energy Physics
12/13 PSI - Cosmology Review Lecture 9

Latham Boyle University of Edinburgh

March 01, 2013

PIRSA:13030038

Astrophysics
12/13 PSI - Quantum Information Review Lecture 9

Andrew Childs University of Waterloo

March 01, 2013

PIRSA:13030046

Quantum Physics
12/13 PSI - Beyond the Standard Model Lecture 9

Itay Yavin McMaster University

Natalia Toro Stanford University

March 01, 2013

PIRSA:13030030

High Energy Physics
Advanced General Relativity - Lecture 12

Rafael Sorkin Perimeter Institute for Theoretical Physics

February 28, 2013

PIRSA:13020028
Gravitational anomaly and topological phases

Shinsei Ryu University of Illinois at Urbana-Champaign (UIUC)

February 28, 2013

PIRSA:13020148

Condensed Matter
Exploiting the Strong Gravitational Fields of Neutron Stars to Measure their Properties

Dimitrios Psaltis University of Arizona

February 28, 2013

PIRSA:13020126

General Relativity & Quantum Cosmology
12/13 PSI - Cosmology Review Lecture 8

Latham Boyle University of Edinburgh

February 28, 2013

PIRSA:13020108

Astrophysics
12/13 PSI - Quantum Information Review Lecture 8

Andrew Childs University of Waterloo

February 28, 2013

PIRSA:13020118

Quantum Physics

Getting the Most out of a Black Hole

Alexander Tchekhovskoy Princeton University

March 04, 2013

PIRSA:13030102

Astrophysics

As black holes accrete surrounding gas, they often produce relativistic, collimated outflows, or jets. Jets are expected to form in the black hole vicinity making them powerful probes of strong-field gravity. However, how jet properties are connected to black hole and accretion flow properties has been unclear. Recent progress in computer simulations of black hole accretion enables studies of jet formation in unprecedented detail. For the first time, 3D general relativistic magnetohydrodynamic numerical simulations allow one to determine the maximum efficiency with which accretion onto black holes can power relativistic jets. I will present the dependence of this maximum efficiency on black hole spin and discuss how this dependence allows one to probe strong-field gravity. In realistic astrophysical systems, the angular momentum vector of the accretion flow can be tilted relative to the spin of the black hole. I will present the first simulations of jets from such tilted accretion systems and discuss their observational signatures.
12/13 PSI - Cosmology Review Lecture 10

Latham Boyle University of Edinburgh

March 04, 2013

PIRSA:13030041

Astrophysics
12/13 PSI - Quantum Information Review Lecture 10

Andrew Childs University of Waterloo

March 04, 2013

PIRSA:13030049

Quantum Physics
12/13 PSI - Beyond the Standard Model Lecture 10

Itay Yavin McMaster University

Natalia Toro Stanford University

March 04, 2013

PIRSA:13030033

High Energy Physics
12/13 PSI - Cosmology Review Lecture 9

Latham Boyle University of Edinburgh

March 01, 2013

PIRSA:13030038

Astrophysics
12/13 PSI - Quantum Information Review Lecture 9

Andrew Childs University of Waterloo

March 01, 2013

PIRSA:13030046

Quantum Physics
12/13 PSI - Beyond the Standard Model Lecture 9

Itay Yavin McMaster University

Natalia Toro Stanford University

March 01, 2013

PIRSA:13030030

High Energy Physics
Advanced General Relativity - Lecture 12

Rafael Sorkin Perimeter Institute for Theoretical Physics

February 28, 2013

PIRSA:13020028
Gravitational anomaly and topological phases

Shinsei Ryu University of Illinois at Urbana-Champaign (UIUC)

February 28, 2013

PIRSA:13020148

Condensed Matter

Since the quantum Hall effect, the notion of topological phases of matter has been extended to those that are well-defined (or: ``protected'') in the presence of a certain set of symmetries, and that exist in dimensions higher than two. In the (fractional) quantum Hall effects (and in ``chiral'' topological phases in general), Laughlin's thought experiment provides a key insight into their topological characterization; it shows a close connection between topological phases and quantum anomalies. By taking various examples, I will demonstrate that quantum anomalies serve as a useful tool to diagnose (and even define) topological properties of the systems. For chiral topological phases in (2+1) dimensions and (3+1) dimensional topological superconductors, I will discuss topological responses of the system which involve a cross correlation between thermal transport, angular momentum, and entropy. We also argue that gravitational anomaly is useful to study symmetry protected topological phases in (2+1) dimensions.
Exploiting the Strong Gravitational Fields of Neutron Stars to Measure their Properties

Dimitrios Psaltis University of Arizona

February 28, 2013

PIRSA:13020126

General Relativity & Quantum Cosmology

Neutron stars possess the strongest gravitational fields among stellar objects in the Universe that are not surrounded by a horizon. This causes the emission from their surfaces to be strongly lensed and deformed. Two upcoming space X-ray missions, ESA's LOFT and NASA's NICER, aim to use observations of lightcurves from spinning neutron stars to map their gravitational fields as well as measure their masses and radii. In this talk, I will discuss some unexpected strong-field phenomena that affect gravitational lensing in the vicinity of neutron stars. I will then show how we can use these phenomena to measure strong-field frame dragging and break degeneracies in the measured neutron-star masses and radii.
12/13 PSI - Cosmology Review Lecture 8

Latham Boyle University of Edinburgh

February 28, 2013

PIRSA:13020108

Astrophysics
12/13 PSI - Quantum Information Review Lecture 8

Andrew Childs University of Waterloo

February 28, 2013

PIRSA:13020118

Quantum Physics

Title	Date	Collection	Type	Info
Getting the Most out of a Black Hole	2013‑03‑04	Colloquium	Scientific Series	View details
12/13 PSI - Cosmology Review Lecture 10	2013‑03‑04	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Quantum Information Review Lecture 10	2013‑03‑04	12/13 PSI - Quantum Information Review	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 10	2013‑03‑04	12/13 PSI - Beyond the Standard Model	Course	View details
12/13 PSI - Cosmology Review Lecture 9	2013‑03‑01	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Quantum Information Review Lecture 9	2013‑03‑01	12/13 PSI - Quantum Information Review	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 9	2013‑03‑01	12/13 PSI - Beyond the Standard Model	Course	View details
Advanced General Relativity - Lecture 12	2013‑02‑28	Elements of General Relativity	Course	View details
Gravitational anomaly and topological phases	2013‑02‑28	Quantum Matter	Scientific Series	View details
Exploiting the Strong Gravitational Fields of Neutron Stars to Measure their Properties	2013‑02‑28	Strong Gravity	Scientific Series	View details
12/13 PSI - Cosmology Review Lecture 8	2013‑02‑28	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Quantum Information Review Lecture 8	2013‑02‑28	12/13 PSI - Quantum Information Review	Course	View details

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Format results

Getting the Most out of a Black Hole

12/13 PSI - Cosmology Review Lecture 10

12/13 PSI - Quantum Information Review Lecture 10

12/13 PSI - Beyond the Standard Model Lecture 10

12/13 PSI - Cosmology Review Lecture 9

12/13 PSI - Quantum Information Review Lecture 9

12/13 PSI - Beyond the Standard Model Lecture 9

Advanced General Relativity - Lecture 12

Gravitational anomaly and topological phases

Exploiting the Strong Gravitational Fields of Neutron Stars to Measure their Properties

12/13 PSI - Cosmology Review Lecture 8

12/13 PSI - Quantum Information Review Lecture 8

Getting the Most out of a Black Hole

12/13 PSI - Cosmology Review Lecture 10

12/13 PSI - Quantum Information Review Lecture 10

12/13 PSI - Beyond the Standard Model Lecture 10

12/13 PSI - Cosmology Review Lecture 9

12/13 PSI - Quantum Information Review Lecture 9

12/13 PSI - Beyond the Standard Model Lecture 9

Advanced General Relativity - Lecture 12

Gravitational anomaly and topological phases

Exploiting the Strong Gravitational Fields of Neutron Stars to Measure their Properties

12/13 PSI - Cosmology Review Lecture 8

12/13 PSI - Quantum Information Review Lecture 8