Talks

12409 - 12420 of 20114 Results

13/14 PSI - Relativity - Lecture 1

Neil Turok University of Edinburgh

September 09, 2013

PIRSA:13090011
The local Callan-Symanzik equation: structure and applications

Boaz Keren-Zur L'Ecole Polytechnique Federale de Lausanne (EPFL)

September 06, 2013

PIRSA:13090067

High Energy Physics
13/14 PSI - QFT 0 - Lecture 4

Freddy Cachazo Perimeter Institute for Theoretical Physics

September 06, 2013

PIRSA:13090059
13/14 PSI - Computational Methods in Physics - Lecture 4

Erik Schnetter Perimeter Institute for Theoretical Physics

September 06, 2013

PIRSA:13090055
13/14 PSI - QFT 0 - Lecture 3

Freddy Cachazo Perimeter Institute for Theoretical Physics

September 05, 2013

PIRSA:13090058
13/14 PSI - Computational Methods in Physics - Lecture 3

Erik Schnetter Perimeter Institute for Theoretical Physics

September 05, 2013

PIRSA:13090054
13/14 PSI - QFT 0 - Lecture 2

Freddy Cachazo Perimeter Institute for Theoretical Physics

September 04, 2013

PIRSA:13090057
13/14 PSI - Computational Methods in Physics - Lecture 2

Erik Schnetter Perimeter Institute for Theoretical Physics

September 04, 2013

PIRSA:13090053
A Non-Local Reality: Is there a Phase Uncertainty in Quantum Mechanics?

Niayesh Afshordi University of Waterloo

Elizabeth Gould Arthur B. McDonald Canadian Astroparticle Physics Research Institute

September 03, 2013

PIRSA:13090064

Quantum Physics
Peaks, excursion sets and the distribution of dark matter haloes

Vincent Desjacques Université de Genève

September 03, 2013

PIRSA:13090062

Astrophysics
13/14 PSI - QFT 0 - Lecture 1

Freddy Cachazo Perimeter Institute for Theoretical Physics

September 03, 2013

PIRSA:13090056
13/14 PSI - Computational Methods in Physics - Lecture 1

Erik Schnetter Perimeter Institute for Theoretical Physics

September 03, 2013

PIRSA:13090052

13/14 PSI - Relativity - Lecture 1

Neil Turok University of Edinburgh

September 09, 2013

PIRSA:13090011
The local Callan-Symanzik equation: structure and applications

Boaz Keren-Zur L'Ecole Polytechnique Federale de Lausanne (EPFL)

September 06, 2013

PIRSA:13090067

High Energy Physics

The local Callan-Symanzik equation describes the response of a quantum field theory to local scale transformations in the presence of background sources. The consistency conditions associated with this anomalous equation can be used to derive powerful constraints on RG flows. We will discuss various aspects of the equation and present new results regarding the structure of the anomaly. We then use the equation to write correlation functions of the trace of the energy-momentum tensor off-criticality.
13/14 PSI - QFT 0 - Lecture 4

Freddy Cachazo Perimeter Institute for Theoretical Physics

September 06, 2013

PIRSA:13090059
13/14 PSI - Computational Methods in Physics - Lecture 4

Erik Schnetter Perimeter Institute for Theoretical Physics

September 06, 2013

PIRSA:13090055
13/14 PSI - QFT 0 - Lecture 3

Freddy Cachazo Perimeter Institute for Theoretical Physics

September 05, 2013

PIRSA:13090058
13/14 PSI - Computational Methods in Physics - Lecture 3

Erik Schnetter Perimeter Institute for Theoretical Physics

September 05, 2013

PIRSA:13090054
13/14 PSI - QFT 0 - Lecture 2

Freddy Cachazo Perimeter Institute for Theoretical Physics

September 04, 2013

PIRSA:13090057
13/14 PSI - Computational Methods in Physics - Lecture 2

Erik Schnetter Perimeter Institute for Theoretical Physics

September 04, 2013

PIRSA:13090053
A Non-Local Reality: Is there a Phase Uncertainty in Quantum Mechanics?

Niayesh Afshordi University of Waterloo

Elizabeth Gould Arthur B. McDonald Canadian Astroparticle Physics Research Institute

September 03, 2013

PIRSA:13090064

Quantum Physics

A century after the advent of Quantum Mechanics and General Relativity, both theories enjoy incredible empirical success, constituting the cornerstones of modern physics. Yet, paradoxically, they suffer from deep-rooted, so-far intractable, conflicts. Motivations for violations of the notion of
relativistic locality include the Bell's inequalities for hidden variable theories, the cosmological horizon problem, and Lorentz-violating approaches to quantum geometrodynamics, such as Horava-Lifshitz gravity. Here, we explore a recent proposal for a ``real ensemble'' non-local description of quantum mechanics, in which ``particles'' can copy each others' observables AND phases, independent of their spatial separation. We first specify the exact theory, ensuring that it is consistent and has (ordinary) quantum mechanics as a fixed point, where all particles with the same observables have the same phases. We then study the stability of this fixed point numerically, and analytically, for simple models. We provide evidence that most systems (in our study) are locally stable to small deviations from quantum mechanics, and furthermore, the phase variance per observable, as well as systematic deviations from quantum mechanics, decay as ~ (EnergyXTime)^{-n}, where n > 2. Interestingly, this convergence is controlled by the absolute value of energy (and not energy difference). Finally, we discuss different issues related to this theory, as well as potential implications for early universe, and the cosmological constant problem.
Peaks, excursion sets and the distribution of dark matter haloes

Vincent Desjacques Université de Genève

September 03, 2013

PIRSA:13090062

Astrophysics

I will review recent developments in our theoretical understanding of the abundance and clustering of dark matter haloes. In the first part of this talk, I will discuss a toy model based on the statistics of peaks of Gaussian random field (Bardeen et al 1986) and show how the clustering properties of such a point set can be easily derived from a generalised local bias expansion. In the second part, I will explain how this peak formalism relates to the excursion set approach and present parameter-free predictions for the mass function and bias of dark matter halos.
13/14 PSI - QFT 0 - Lecture 1

Freddy Cachazo Perimeter Institute for Theoretical Physics

September 03, 2013

PIRSA:13090056
13/14 PSI - Computational Methods in Physics - Lecture 1

Erik Schnetter Perimeter Institute for Theoretical Physics

September 03, 2013

PIRSA:13090052

Title	Date	Collection	Type	Info
13/14 PSI - Relativity - Lecture 1	2013‑09‑09	13/14 PSI - Relativity	Course	View details
The local Callan-Symanzik equation: structure and applications	2013‑09‑06	Particle Physics	Scientific Series	View details
13/14 PSI - QFT 0 - Lecture 4	2013‑09‑06	13/14 PSI - Front End	Course	View details
13/14 PSI - Computational Methods in Physics - Lecture 4	2013‑09‑06	13/14 PSI - Front End	Course	View details
13/14 PSI - QFT 0 - Lecture 3	2013‑09‑05	13/14 PSI - Front End	Course	View details
13/14 PSI - Computational Methods in Physics - Lecture 3	2013‑09‑05	13/14 PSI - Front End	Course	View details
13/14 PSI - QFT 0 - Lecture 2	2013‑09‑04	13/14 PSI - Front End	Course	View details
13/14 PSI - Computational Methods in Physics - Lecture 2	2013‑09‑04	13/14 PSI - Front End	Course	View details
A Non-Local Reality: Is there a Phase Uncertainty in Quantum Mechanics?	2013‑09‑03	Quantum Foundations	Scientific Series	View details
Peaks, excursion sets and the distribution of dark matter haloes	2013‑09‑03	Cosmology and Gravitation	Scientific Series	View details
13/14 PSI - QFT 0 - Lecture 1	2013‑09‑03	13/14 PSI - Front End	Course	View details
13/14 PSI - Computational Methods in Physics - Lecture 1	2013‑09‑03	13/14 PSI - Front End	Course	View details

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Format results

13/14 PSI - Relativity - Lecture 1

The local Callan-Symanzik equation: structure and applications

13/14 PSI - QFT 0 - Lecture 4

13/14 PSI - Computational Methods in Physics - Lecture 4

13/14 PSI - QFT 0 - Lecture 3

13/14 PSI - Computational Methods in Physics - Lecture 3

13/14 PSI - QFT 0 - Lecture 2

13/14 PSI - Computational Methods in Physics - Lecture 2

A Non-Local Reality: Is there a Phase Uncertainty in Quantum Mechanics?

Peaks, excursion sets and the distribution of dark matter haloes

13/14 PSI - QFT 0 - Lecture 1

13/14 PSI - Computational Methods in Physics - Lecture 1

13/14 PSI - Relativity - Lecture 1

The local Callan-Symanzik equation: structure and applications

13/14 PSI - QFT 0 - Lecture 4

13/14 PSI - Computational Methods in Physics - Lecture 4

13/14 PSI - QFT 0 - Lecture 3

13/14 PSI - Computational Methods in Physics - Lecture 3

13/14 PSI - QFT 0 - Lecture 2

13/14 PSI - Computational Methods in Physics - Lecture 2

A Non-Local Reality: Is there a Phase Uncertainty in Quantum Mechanics?

Peaks, excursion sets and the distribution of dark matter haloes

13/14 PSI - QFT 0 - Lecture 1

13/14 PSI - Computational Methods in Physics - Lecture 1