Talks

9661 - 9672 of 16758 Results

13/14 PSI - Condensed Matter Review - Lecture 7

Alioscia Hamma University of Naples Federico II

February 05, 2014

PIRSA:14020041
Introduction to Quantum Field Theory for Cosmology - Lecture 9

Achim Kempf University of Waterloo

February 04, 2014

PIRSA:14020000
Towards a 1/c Expansion in 2d Conformal Field Theory

February 04, 2014

PIRSA:14020084

Quantum Fields and Strings
13/14 PSI - Cosmology Review - Lecture 6

Latham Boyle University of Edinburgh

February 04, 2014

PIRSA:14020012
Cosmological constraints on complex scalar-field dark matter

Tanja Rindler-Daller University of Michigan–Ann Arbor

February 04, 2014

PIRSA:14020096

Cosmology
13/14 PSI - String Theory Review - Lecture 6

Davide Gaiotto Perimeter Institute for Theoretical Physics

February 04, 2014

PIRSA:14020024
13/14 PSI - Condensed Matter Review - Lecture 6

Alioscia Hamma University of Naples Federico II

February 04, 2014

PIRSA:14020040
13/14 PSI - Cosmology Review - Lecture 5

Latham Boyle University of Edinburgh

February 03, 2014

PIRSA:14010069
13/14 PSI - String Theory Review - Lecture 5

Davide Gaiotto Perimeter Institute for Theoretical Physics

February 03, 2014

PIRSA:14010074
13/14 PSI - Condensed Matter Review - Lecture 5

Alioscia Hamma University of Naples Federico II

February 03, 2014

PIRSA:14010079
Introduction to Effective Field Theories - Lecture 8

Cliff Burgess McMaster University

January 31, 2014

PIRSA:14010094
13/14 PSI - Cosmology Review - Lecture 4

Latham Boyle University of Edinburgh

January 31, 2014

PIRSA:14010068

13/14 PSI - Condensed Matter Review - Lecture 7

Alioscia Hamma University of Naples Federico II

February 05, 2014

PIRSA:14020041
Introduction to Quantum Field Theory for Cosmology - Lecture 9

Achim Kempf University of Waterloo

February 04, 2014

PIRSA:14020000
Towards a 1/c Expansion in 2d Conformal Field Theory

February 04, 2014

PIRSA:14020084

Quantum Fields and Strings

I will describe progress in deriving 3d gravity directly from 2d conformal field theory at large central charge 'c'. In a large class of CFTs, using general arguments like modular invariance, crossing symmetry, and the OPE expansion, the spectrum, the entanglement entropy, and certain partition functions can be computed to leading order in a 1/c expansion. The results agree with universal features of 3d gravity required by black hole thermodynamics and the Ryu-Takayanagi formula; furthermore, the relevant 3d geometries appear automatically from CFT calculations in this regime.
13/14 PSI - Cosmology Review - Lecture 6

Latham Boyle University of Edinburgh

February 04, 2014

PIRSA:14020012
Cosmological constraints on complex scalar-field dark matter

Tanja Rindler-Daller University of Michigan–Ann Arbor

February 04, 2014

PIRSA:14020096

Cosmology

The nature of dark matter is a fundamental problem in cosmology and particle physics. Many particle candidates have been devised over the course of the last decades, and are still at stake to be soon discovered or rejected. However, astronomical observations, in conjunction with the phenomenological efforts in astrophysical modeling, as well as in particle theories to explain them, have helped to pin down several key properties which any successful candidate has to have. In this talk, I will explore the possibility that dark matter is described by a complex scalar field (SFDM), while the other cosmic components are treated in the usual way, assuming a cosmological constant for the dark energy. We will see that the background evolution of a Universe with SFDM and a cosmological constant (LSFDM) complies with the concordance LCDM model, if the model parameters of the SFDM Lagrangian, mass and repulsive 2-particle self-interaction coupling strength, are properly constrained by observations of the cosmic microwave background and Big Bang nucleosynthesis (BBN). However, not only does LSFDM lead to non-standard expansion histories prior to BBN, it also exemplifies differences at small scales, which could help to resolve the discrepancies found between LCDM and certain galaxy observations. I will highlight the differences between complex SFDM and dark matter described by real fields, as for instance axion-like particles. If time permits, I will also talk about possible implementations of SFDM in the very early Universe, in the wake of its inflationary phase.
13/14 PSI - String Theory Review - Lecture 6

Davide Gaiotto Perimeter Institute for Theoretical Physics

February 04, 2014

PIRSA:14020024
13/14 PSI - Condensed Matter Review - Lecture 6

Alioscia Hamma University of Naples Federico II

February 04, 2014

PIRSA:14020040
13/14 PSI - Cosmology Review - Lecture 5

Latham Boyle University of Edinburgh

February 03, 2014

PIRSA:14010069
13/14 PSI - String Theory Review - Lecture 5

Davide Gaiotto Perimeter Institute for Theoretical Physics

February 03, 2014

PIRSA:14010074
13/14 PSI - Condensed Matter Review - Lecture 5

Alioscia Hamma University of Naples Federico II

February 03, 2014

PIRSA:14010079
Introduction to Effective Field Theories - Lecture 8

Cliff Burgess McMaster University

January 31, 2014

PIRSA:14010094
13/14 PSI - Cosmology Review - Lecture 4

Latham Boyle University of Edinburgh

January 31, 2014

PIRSA:14010068

Title	Date	Collection	Type	Info
13/14 PSI - Condensed Matter Review - Lecture 7	2014‑02‑05	13/14 PSI - Condensed Matter Review	Course	View details
Introduction to Quantum Field Theory for Cosmology - Lecture 9	2014‑02‑04	Quantum Field Theory for Cosmology - 2014	Course	View details
Towards a 1/c Expansion in 2d Conformal Field Theory	2014‑02‑04	Quantum Fields and Strings	Scientific Series	View details
13/14 PSI - Cosmology Review - Lecture 6	2014‑02‑04	13/14 PSI - Cosmology Review	Course	View details
Cosmological constraints on complex scalar-field dark matter	2014‑02‑04	Cosmology and Gravitation	Scientific Series	View details
13/14 PSI - String Theory Review - Lecture 6	2014‑02‑04	13/14 PSI - String Theory Review	Course	View details
13/14 PSI - Condensed Matter Review - Lecture 6	2014‑02‑04	13/14 PSI - Condensed Matter Review	Course	View details
13/14 PSI - Cosmology Review - Lecture 5	2014‑02‑03	13/14 PSI - Cosmology Review	Course	View details
13/14 PSI - String Theory Review - Lecture 5	2014‑02‑03	13/14 PSI - String Theory Review	Course	View details
13/14 PSI - Condensed Matter Review - Lecture 5	2014‑02‑03	13/14 PSI - Condensed Matter Review	Course	View details
Introduction to Effective Field Theories - Lecture 8	2014‑01‑31	Introduction to Effective Field Theories	Course	View details
13/14 PSI - Cosmology Review - Lecture 4	2014‑01‑31	13/14 PSI - Cosmology Review	Course	View details

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