Talks

10525 - 10536 of 16447 Results

Quantum Field Theory - Lecture 2A

Konstantin Zarembo
Nordic Institute for Theoretical Physics

October 10, 2012

PIRSA:12100005

Quantum Fields and Strings
New Directions in Categorical Logic for Classical, Probabilistic and Quantum Physics

Tobias Fritz
Universität Innsbruck

October 09, 2012

PIRSA:12100055

Mathematical physics
AdS(3)/CFT(2) correspondence and integrability

Konstantin Zarembo
Nordic Institute for Theoretical Physics

October 09, 2012

PIRSA:12100062

Quantum Fields and Strings

Mathematical physics
Voids in the SDSS: from demography to cosmology

Paul Sutter
Institut d'Astrophysique de Paris

October 09, 2012

PIRSA:12100041

Cosmology
Scalars with Higher Derivatives in Supergravity and Cosmology

Jean-Luc Lehners
Self Employed

October 09, 2012

PIRSA:12100042

Cosmology
Condensed Matter - Lecture 1

Assa Auerbach
Technion – Israel Institute of Technology

October 09, 2012

PIRSA:12100022

Condensed Matter
Quantum Field Theory - Lecture 1

Konstantin Zarembo
Nordic Institute for Theoretical Physics

October 09, 2012

PIRSA:12100004

Quantum Fields and Strings
Testing Strong-Field General Relativity with Black Holes

Tim Johannsen

October 04, 2012

PIRSA:12100049
Probability and Statistics with Prof David Spiegelhalter - Lecture 14

October 04, 2012

PIRSA:12100137
Massey Lecture Kick-off - Neil Turok - The Universe Within

Neil Turok
University of Edinburgh

October 03, 2012

PIRSA:12100057
Massey Lecture - Other location

Neil Turok
University of Edinburgh

October 03, 2012

PIRSA:12100133

Cosmology
Probability and Statistics with Prof David Spiegelhalter - Lecture 13

October 03, 2012

PIRSA:12100136

Quantum Field Theory - Lecture 2A

Konstantin Zarembo
Nordic Institute for Theoretical Physics

October 10, 2012

PIRSA:12100005

Quantum Fields and Strings
New Directions in Categorical Logic for Classical, Probabilistic and Quantum Physics

Tobias Fritz
Universität Innsbruck

October 09, 2012

PIRSA:12100055

Mathematical physics

I will give an idea of what category theory is and how it can be successfully applied in mathematics and the mathematical sciences by means of example. The example is a notion from mathematical logic formalizing the intuitive concept of "property". The new category-theoretical definition of this notion can physically be interpreted as a measurement. Unraveling this definition in particular categories can be regarded as defining the concept of "property" in different context, e.g. in classical, probabilistic and quantum physics, and in each case this recovers familiar things.
Disclaimer: Up to some differences in the technical details, all of this is work of Bart Jacobs. (See arXiv:1205.3940)
AdS(3)/CFT(2) correspondence and integrability

Konstantin Zarembo
Nordic Institute for Theoretical Physics

October 09, 2012

PIRSA:12100062

Quantum Fields and Strings

Mathematical physics

Integrability has been successfully used to compute the non-perturbative spectrum, Wilson loops and scattering amplitudes in the AdS/CFT correspondence. Most of these results apply to N=4, D=4 SYM / strings on AdS(5)xS(5). Strings on AdS(3)xM, where M is either S(3)xT(4) or S(3)xS(3)xS(1), are also integrable and potentially solvable by the same methods (Bethe ansatz, Y-system, TBA etc). An interesting aspect of string theory on AdS(3) is a large number of parameters that preserve integrability. One parameters, in particular, interpolates between the integrable RR AdS(3) background and conformal NSNS background described by a non-compact WZW model. Another interesting aspect of string theory on AdS(3) is emergence of target-space Viraroso symmetry. I will review how integrability arises in the AdS(3)/CFT(2) correspondence, and will describe what is (not) know about the Bethe ansatz solution of the relevant sigma-models.
Voids in the SDSS: from demography to cosmology

Paul Sutter
Institut d'Astrophysique de Paris

October 09, 2012

PIRSA:12100041

Cosmology

Cosmic voids are potentially a rich source of information for both astrophysics and cosmology. To enable such science, we produce the most comprehensive void catalog to date using the Sloan Digital Sky Survey Data Release 7 main sample out to redshift z = 0.2 and the Luminous Red Galaxy sample out to z = 0.44. Using a modified version of the parameter-free void finder ZOBOV, we fully take into account the presence of survey boundary and masks. We discuss basic catalog statistics such as number counts and redshift distributions, as well as describe some example data products derived from our catalog, such as radial density profiles and projected density maps. Using this catalog, we report on the first application of the Alcock-Paczynski test to stacked voids in spectroscopic redshift surveys by applying the shape-fitting procedure presented in Lavaux & Wandelt (2011) to ten void stacks out to redshift z = 0.36. Our results are consistent with WMAP 7-year cosmological constraints. We compare our results to alternate methods of constructing void stacks and comment on future observational prospects.
Scalars with Higher Derivatives in Supergravity and Cosmology

Jean-Luc Lehners
Self Employed

October 09, 2012

PIRSA:12100042

Cosmology

There are many situations in cosmology that motivate the study of scalar fields with higher-derivative actions. The best-known such situations are probably k-inflation (with DBI-inflation being a special case) and models based on galileon theories, but even eternal inflation and cyclic universes provide good reasons to study such theories. After an extended discussion of the motivations, I will show how scalar field theories with higher derivatives can be constructed in (minimal, 4-dimensional) supergravity, and will discuss their properties, especially in regard to their cosmological applications.
Condensed Matter - Lecture 1

Assa Auerbach
Technion – Israel Institute of Technology

October 09, 2012

PIRSA:12100022

Condensed Matter
Quantum Field Theory - Lecture 1

Konstantin Zarembo
Nordic Institute for Theoretical Physics

October 09, 2012

PIRSA:12100004

Quantum Fields and Strings
Testing Strong-Field General Relativity with Black Holes

Tim Johannsen

October 04, 2012

PIRSA:12100049
Probability and Statistics with Prof David Spiegelhalter - Lecture 14

October 04, 2012

PIRSA:12100137

We shall follow the growth of probability theory and applications from the 1650s onwards, in parallel with the development of statistical inference. Bayesian, Neyman-Pearson hypothesis testing and Fisherian likelihood methods will all be covered, with an emphasis on relating theory to a wide range of applications. Practical sessions will use SciPy and feature closed-form solutions, iterative and Monte Carlo simulation methods.
Massey Lecture Kick-off - Neil Turok - The Universe Within

Neil Turok
University of Edinburgh

October 03, 2012

PIRSA:12100057
Massey Lecture - Other location

Neil Turok
University of Edinburgh

October 03, 2012

PIRSA:12100133

Cosmology
Probability and Statistics with Prof David Spiegelhalter - Lecture 13

October 03, 2012

PIRSA:12100136

We shall follow the growth of probability theory and applications from the 1650s onwards, in parallel with the development of statistical inference. Bayesian, Neyman-Pearson hypothesis testing and Fisherian likelihood methods will all be covered, with an emphasis on relating theory to a wide range of applications. Practical sessions will use SciPy and feature closed-form solutions, iterative and Monte Carlo simulation methods.

Title	Date	Collection	Type	Info
Quantum Field Theory - Lecture 2A	2012‑10‑10	12/13 PSI - Quantum Field Theory 1	Course	View details
New Directions in Categorical Logic for Classical, Probabilistic and Quantum Physics	2012‑10‑09	Quantum Foundations	Scientific Series	View details
AdS(3)/CFT(2) correspondence and integrability	2012‑10‑09	Quantum Fields and Strings	Scientific Series	View details
Voids in the SDSS: from demography to cosmology	2012‑10‑09	Cosmology and Gravitation	Scientific Series	View details
Scalars with Higher Derivatives in Supergravity and Cosmology	2012‑10‑09	Cosmology and Gravitation	Scientific Series	View details
Condensed Matter - Lecture 1	2012‑10‑09	12/13 PSI - Condensed Matter	Course	View details
Quantum Field Theory - Lecture 1	2012‑10‑09	12/13 PSI - Quantum Field Theory 1	Course	View details
Testing Strong-Field General Relativity with Black Holes	2012‑10‑04	Strong Gravity	Scientific Series	View details
Probability and Statistics with Prof David Spiegelhalter - Lecture 14	2012‑10‑04	Probability and Statistics	Course	View details
Massey Lecture Kick-off - Neil Turok - The Universe Within	2012‑10‑03	Public Lecture Series	Public Lectures	View details
Massey Lecture - Other location	2012‑10‑03	Public Lecture Series	Public Lectures	View details
Probability and Statistics with Prof David Spiegelhalter - Lecture 13	2012‑10‑03	Probability and Statistics	Course	View details

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