Talks

11857 - 11868 of 20132 Results

Exact holographic mapping and emergent space-time geometry

Xiaoliang Qi Stanford University

March 11, 2014

PIRSA:14030107

Condensed Matter
Line Defects and Tropicalization

Clay Cordova University of Chicago

March 11, 2014

PIRSA:14030106

High Energy Physics
SDSS-III BOSS and Beyond: fundamental physics with galaxy redshift surveys

Beth Reid Lawrence Berkeley National Laboratory

March 11, 2014

PIRSA:14030096

Astrophysics
Introduction to Effective Field Theories - Lecture 16

Cliff Burgess McMaster University

March 07, 2014

PIRSA:14020095
13/14 PSI - Quantum Information Review - Lecture 14

Andrew Childs University of Waterloo

March 07, 2014

PIRSA:14030028
13/14 PSI - Quantum Gravity Review - Lecture 14

Bianca Dittrich Perimeter Institute for Theoretical Physics

March 07, 2014

PIRSA:14030021
13/14 PSI - Beyond the Standard Model - Lecture 13

Robert Mann University of Waterloo

March 07, 2014

PIRSA:14030014
Introduction to Effective Field Theories - Lecture 15

Cliff Burgess McMaster University

March 07, 2014

PIRSA:14020091
Introduction to Quantum Field Theory for Cosmology - Lecture 16

Achim Kempf University of Waterloo

March 06, 2014

PIRSA:14020007
13/14 PSI - Beyond the Standard Model - Lecture 12

Robert Mann University of Waterloo

March 06, 2014

PIRSA:14030013
A one-dimensional action for simplicial gravity in three dimensions

Wolfgang Wieland University of Erlangen-Nuremberg

March 06, 2014

PIRSA:14030088

General Relativity & Quantum Cosmology
Sequestering Lorentz violation in the Lifshitz sector

Maxim Pospelov University of Minnesota

March 06, 2014

PIRSA:14030092

General Relativity & Quantum Cosmology

Exact holographic mapping and emergent space-time geometry

Xiaoliang Qi Stanford University

March 11, 2014

PIRSA:14030107

Condensed Matter

Holographic duality is a duality between quantum many-body systems (boundary) and gravity systems with one additional spatial dimension (bulk). In this talk, I will describe a new approach to holographic duality for lattice systems, called the exact holographic mapping. The key idea of this approach can be summarized by two points: 1) The bulk theory is nothing but the boundary theory viewed in a different basis. 2) Space-time geometry is determined by the structure of correlations and quantum entanglement in a quantum state. For free fermion boundary theories, I will show how different bulk geometries including AdS space, black holes and worm-holes emerge. I will also discuss the generalization of this approach in more generic interacting systems.
Line Defects and Tropicalization

Clay Cordova University of Chicago

March 11, 2014

PIRSA:14030106

High Energy Physics

I will review BPS line defects in 4d N=2 field theories and describe a technique for calculating their spectra using quiver quantum mechanics.
SDSS-III BOSS and Beyond: fundamental physics with galaxy redshift surveys

Beth Reid Lawrence Berkeley National Laboratory

March 11, 2014

PIRSA:14030096

Astrophysics

The SDSS-III Baryon Oscillation Spectroscopic Survey, now nearly complete, is measuring the three-dimensional cosmic structure with 1.35 million new redshifts. Galaxy clustering measurements provide constraints on the cosmic expansion history through the baryon acoustic oscillation feature and the Alcock-Paczynski effect. In addition, the imprint of galaxy peculiar velocities on the observed galaxy clustering, "redshift-space distortions", provides a measurement of the growth rate of matter perturbations. Taken together, these measurements provide excellent constraints on dark energy and test the relation between expansion history and growth of perturbations expected in General Relativity. I will summarize results from BOSS's recent DR11 results and highlight what we may learn about fundamental physics (especially neutrinos) from the upcoming Dark Energy Spectroscopic Instrument (DESI).
Introduction to Effective Field Theories - Lecture 16

Cliff Burgess McMaster University

March 07, 2014

PIRSA:14020095
13/14 PSI - Quantum Information Review - Lecture 14

Andrew Childs University of Waterloo

March 07, 2014

PIRSA:14030028
13/14 PSI - Quantum Gravity Review - Lecture 14

Bianca Dittrich Perimeter Institute for Theoretical Physics

March 07, 2014

PIRSA:14030021
13/14 PSI - Beyond the Standard Model - Lecture 13

Robert Mann University of Waterloo

March 07, 2014

PIRSA:14030014
Introduction to Effective Field Theories - Lecture 15

Cliff Burgess McMaster University

March 07, 2014

PIRSA:14020091
Introduction to Quantum Field Theory for Cosmology - Lecture 16

Achim Kempf University of Waterloo

March 06, 2014

PIRSA:14020007
13/14 PSI - Beyond the Standard Model - Lecture 12

Robert Mann University of Waterloo

March 06, 2014

PIRSA:14030013
A one-dimensional action for simplicial gravity in three dimensions

Wolfgang Wieland University of Erlangen-Nuremberg

March 06, 2014

PIRSA:14030088

General Relativity & Quantum Cosmology

Loop quantum gravity has a spinorial representation. Spinors simplify the symplectic structure of the theory, but can they also teach us something about the dynamics? We study this question in three dimensions, and derive the Ponzano–-Regge model from a spinorial action. Our construction starts from the first-order Palatini formalism, and gives the discretised action in the spinorial representation. A one-dimensional refinement limit brings us back to a continuum theory. The three-dimensional action turns into a line integral over the edges of the discretisation. We compute the gauge-fixed path integral for a generic simplicial discretisation. The resulting amplitudes reproduce the Ponzano–-Regge model.
Sequestering Lorentz violation in the Lifshitz sector

Maxim Pospelov University of Minnesota

March 06, 2014

PIRSA:14030092

General Relativity & Quantum Cosmology

Horava's proposal to use Lifshitz propagators for gravitons above certain energy scales may provide a viable theory of quantum gravity without further need of UV completion. In my talk, I will address the question of whether the complete lack of Lorentz invariance above a certain energy scale is a big problem for any realistic construction. I will argue that it is not, provided that the onset of Lifshitz scaling for gravitons occurs at momentum scale much lower than the Planck mass. I will also discuss consequences of combining Lifshitz gravity and supersymmetric matter sector.

Title	Date	Collection	Type	Info
Exact holographic mapping and emergent space-time geometry	2014‑03‑11	Quantum Matter	Scientific Series	View details
Line Defects and Tropicalization	2014‑03‑11	Quantum Fields and Strings	Scientific Series	View details
SDSS-III BOSS and Beyond: fundamental physics with galaxy redshift surveys	2014‑03‑11	Cosmology and Gravitation	Scientific Series	View details
Introduction to Effective Field Theories - Lecture 16	2014‑03‑07	Introduction to Effective Field Theories	Course	View details
13/14 PSI - Quantum Information Review - Lecture 14	2014‑03‑07	13/14 PSI - Quantum Information Review	Course	View details
13/14 PSI - Quantum Gravity Review - Lecture 14	2014‑03‑07	13/14 PSI - Quantum Gravity Review	Course	View details
13/14 PSI - Beyond the Standard Model - Lecture 13	2014‑03‑07	13/14 PSI - Beyond the Standard Model	Course	View details
Introduction to Effective Field Theories - Lecture 15	2014‑03‑07	Introduction to Effective Field Theories	Course	View details
Introduction to Quantum Field Theory for Cosmology - Lecture 16	2014‑03‑06	Quantum Field Theory for Cosmology - 2014	Course	View details
13/14 PSI - Beyond the Standard Model - Lecture 12	2014‑03‑06	13/14 PSI - Beyond the Standard Model	Course	View details
A one-dimensional action for simplicial gravity in three dimensions	2014‑03‑06	Quantum Gravity	Scientific Series	View details
Sequestering Lorentz violation in the Lifshitz sector	2014‑03‑06	Strong Gravity	Scientific Series	View details

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Format results

Exact holographic mapping and emergent space-time geometry

Line Defects and Tropicalization

SDSS-III BOSS and Beyond: fundamental physics with galaxy redshift surveys

Introduction to Effective Field Theories - Lecture 16

13/14 PSI - Quantum Information Review - Lecture 14

13/14 PSI - Quantum Gravity Review - Lecture 14

13/14 PSI - Beyond the Standard Model - Lecture 13

Introduction to Effective Field Theories - Lecture 15

Introduction to Quantum Field Theory for Cosmology - Lecture 16

13/14 PSI - Beyond the Standard Model - Lecture 12

A one-dimensional action for simplicial gravity in three dimensions

Sequestering Lorentz violation in the Lifshitz sector

Exact holographic mapping and emergent space-time geometry

Line Defects and Tropicalization

SDSS-III BOSS and Beyond: fundamental physics with galaxy redshift surveys

Introduction to Effective Field Theories - Lecture 16

13/14 PSI - Quantum Information Review - Lecture 14

13/14 PSI - Quantum Gravity Review - Lecture 14

13/14 PSI - Beyond the Standard Model - Lecture 13

Introduction to Effective Field Theories - Lecture 15

Introduction to Quantum Field Theory for Cosmology - Lecture 16

13/14 PSI - Beyond the Standard Model - Lecture 12

A one-dimensional action for simplicial gravity in three dimensions

Sequestering Lorentz violation in the Lifshitz sector