Talks

12817 - 12828 of 19958 Results

New transport properties of holographic superfluids

Daniel Fernandez University of Iceland

January 10, 2013

PIRSA:13010004

General Relativity & Quantum Cosmology
12/13 PSI - Found Quantum Mechanics Lecture 4

Robert Spekkens Perimeter Institute for Theoretical Physics

January 10, 2013

PIRSA:13010069

High Energy Physics
12/13 PSI - String Theory Review Lecture 4

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 10, 2013

PIRSA:13010046

High Energy Physics
12/13 PSI - Standard Model Review Lecture 4

Mark Wise California Institute of Technology (Caltech)

January 10, 2013

PIRSA:13010027

High Energy Physics
12/13 PSI - Found Quantum Mechanics Lecture 3

Robert Spekkens Perimeter Institute for Theoretical Physics

January 09, 2013

PIRSA:13010068

High Energy Physics
12/13 PSI - String Theory Review Lecture 3

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 09, 2013

PIRSA:13010045

High Energy Physics
12/13 PSI - Standard Model Review Lecture 3

Mark Wise California Institute of Technology (Caltech)

January 09, 2013

PIRSA:13010026

High Energy Physics
Field-induced thermal transport in BEC antiferromagnets

Alexander Chernyshev University of California, Irvine

January 08, 2013

PIRSA:13010002

Condensed Matter
Worldsheet form factors in AdS/CFT

Tristan McLoughlin Trinity College Dublin

January 08, 2013

PIRSA:13010022

High Energy Physics
12/13 PSI - Found Quantum Mechanics Lecture 2

Robert Spekkens Perimeter Institute for Theoretical Physics

January 08, 2013

PIRSA:13010067

High Energy Physics
Fifth forces and new particles from dark energy

Amol Upadhye University of Wisconsin–Madison

January 08, 2013

PIRSA:13010023

Astrophysics
12/13 PSI - String Theory Review Lecture 2

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 08, 2013

PIRSA:13010044

High Energy Physics

New transport properties of holographic superfluids

Daniel Fernandez University of Iceland

January 10, 2013

PIRSA:13010004

General Relativity & Quantum Cosmology

In the context of holography applied to condensed matter theory, I will present an analysis of transport properties of p-wave superfluids by means of a gravity dual. Fluctuations modes in the SU(2) Einstein-Yang-Mills theory are considered, and phenomenological implications are derived. Due to the spatial anisotropy of the system, a non-universal shear viscosity is obtained, along with a new coefficient associated to normal stress differences. I will also discuss how the transport phenomena in this model is related to the thermoelectric, flexoelectric and piezoelectric effects (mixing of electric current, heat flux and mechanical stress), which have been observed in some superconductors and crystal liquids.
12/13 PSI - Found Quantum Mechanics Lecture 4

Robert Spekkens Perimeter Institute for Theoretical Physics

January 10, 2013

PIRSA:13010069

High Energy Physics
12/13 PSI - String Theory Review Lecture 4

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 10, 2013

PIRSA:13010046

High Energy Physics
12/13 PSI - Standard Model Review Lecture 4

Mark Wise California Institute of Technology (Caltech)

January 10, 2013

PIRSA:13010027

High Energy Physics
12/13 PSI - Found Quantum Mechanics Lecture 3

Robert Spekkens Perimeter Institute for Theoretical Physics

January 09, 2013

PIRSA:13010068

High Energy Physics
12/13 PSI - String Theory Review Lecture 3

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 09, 2013

PIRSA:13010045

High Energy Physics
12/13 PSI - Standard Model Review Lecture 3

Mark Wise California Institute of Technology (Caltech)

January 09, 2013

PIRSA:13010026

High Energy Physics
Field-induced thermal transport in BEC antiferromagnets

Alexander Chernyshev University of California, Irvine

January 08, 2013

PIRSA:13010002

Condensed Matter

Recent experiments in BEC quantum magnets exhibit a dramatic evolution of the thermal conductivity of these materials in magnetic field. By considering various relaxation mechanisms of bosonic excitations in the vicinity of the BEC quantum-critical point at finite temperature we provide a detailed explanation of several unusual features of the data. We identify the leading impurity-scattering interaction and demonstrate that its renormalization due to quantum fluctuations of the paramagnetic state compensates the related mass renormalization effect. This explains the enigmatic absence of the asymmetry between the two critical points in the low-T thermal conductivity data, while such an asymmetry is prominent in many other physical quantities. The observed characteristic "migration'' of the peak in thermal conductivity away from the transition points as a function of temperature is explained as due to a competition between an increase in the number of heat carriers and an enhancement of their mutual scattering. An important role of the three-boson scattering processes within the ordered phase of these systems is also discussed. Other qualitative and quantitative features of the experiment are clarified and the future directions are sketched.
Worldsheet form factors in AdS/CFT

Tristan McLoughlin Trinity College Dublin

January 08, 2013

PIRSA:13010022

High Energy Physics

The study of the worldsheet S-matrix for AdS_5×S^5 strings was a key step in the complete determination of the non-pertubrative planar spectrum of anomalous dimensions for N=4 super-Yang-Mills. To go beyond the spectral problem it is important to consider higher-point worldsheet correlation functions and, as is standard in many integrable models, one approach is the study of form factors. We will discuss a set of consistency conditions appropriate to form factors in the light-cone gauge fixed AdS_5×S^5 string theory. We further discuss the form factors in the weakly coupled dual description, verifying that the relevant conditions naturally hold for the one-loop Heisenberg spin-chain.
12/13 PSI - Found Quantum Mechanics Lecture 2

Robert Spekkens Perimeter Institute for Theoretical Physics

January 08, 2013

PIRSA:13010067

High Energy Physics
Fifth forces and new particles from dark energy

Amol Upadhye University of Wisconsin–Madison

January 08, 2013

PIRSA:13010023

Astrophysics

Dark energy coupled to Standard Model fermions and gauge bosons gives rise to fifth forces and new particles, which are readily accessible to experiments from laboratory to cosmological scales. I will discuss chameleon and symmetron models, whose fifth forces are screened locally through large effective masses and symmetry-restoring phase transitions, respectively. Fifth force experiments such as the Eot-Wash torsion balance will test chameleons with small quantum corrections and gravitation-strength fifth forces, as well as symmetrons with coupling energies just beyond the Standard Model scale. A dark energy coupling to electromagnetism would imply that photons passing through a magnetic field will oscillate into particles of dark energy, a phenomenon studied by afterglow experiments such as CHASE. After constraining dark energy using laboratory experiments, I proceed to astrophysical probes. Particles of a photon-coupled dark energy could be produced in the Sun and detected in magnetic helioscopes such as CAST, while fifth forces may alter the dynamics of variable stars and the growth of large-scale structure.
12/13 PSI - String Theory Review Lecture 2

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 08, 2013

PIRSA:13010044

High Energy Physics

Title	Date	Collection	Type	Info
New transport properties of holographic superfluids	2013‑01‑10	Strong Gravity	Scientific Series	View details
12/13 PSI - Found Quantum Mechanics Lecture 4	2013‑01‑10	12/13 PSI - Found Quantum Mechanics	Course	View details
12/13 PSI - String Theory Review Lecture 4	2013‑01‑10	12/13 PSI - String Theory Review	Course	View details
12/13 PSI - Standard Model Review Lecture 4	2013‑01‑10	12/13 PSI - Standard Model Review	Course	View details
12/13 PSI - Found Quantum Mechanics Lecture 3	2013‑01‑09	12/13 PSI - Found Quantum Mechanics	Course	View details
12/13 PSI - String Theory Review Lecture 3	2013‑01‑09	12/13 PSI - String Theory Review	Course	View details
12/13 PSI - Standard Model Review Lecture 3	2013‑01‑09	12/13 PSI - Standard Model Review	Course	View details
Field-induced thermal transport in BEC antiferromagnets	2013‑01‑08	Quantum Matter	Scientific Series	View details
Worldsheet form factors in AdS/CFT	2013‑01‑08	Quantum Fields and Strings	Scientific Series	View details
12/13 PSI - Found Quantum Mechanics Lecture 2	2013‑01‑08	12/13 PSI - Found Quantum Mechanics	Course	View details
Fifth forces and new particles from dark energy	2013‑01‑08	Cosmology and Gravitation	Scientific Series	View details
12/13 PSI - String Theory Review Lecture 2	2013‑01‑08	12/13 PSI - String Theory Review	Course	View details

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Format results

New transport properties of holographic superfluids

12/13 PSI - Found Quantum Mechanics Lecture 4

12/13 PSI - String Theory Review Lecture 4

12/13 PSI - Standard Model Review Lecture 4

12/13 PSI - Found Quantum Mechanics Lecture 3

12/13 PSI - String Theory Review Lecture 3

12/13 PSI - Standard Model Review Lecture 3

Field-induced thermal transport in BEC antiferromagnets

Worldsheet form factors in AdS/CFT

12/13 PSI - Found Quantum Mechanics Lecture 2

Fifth forces and new particles from dark energy

12/13 PSI - String Theory Review Lecture 2

New transport properties of holographic superfluids

12/13 PSI - Found Quantum Mechanics Lecture 4

12/13 PSI - String Theory Review Lecture 4

12/13 PSI - Standard Model Review Lecture 4

12/13 PSI - Found Quantum Mechanics Lecture 3

12/13 PSI - String Theory Review Lecture 3

12/13 PSI - Standard Model Review Lecture 3

Field-induced thermal transport in BEC antiferromagnets

Worldsheet form factors in AdS/CFT

12/13 PSI - Found Quantum Mechanics Lecture 2

Fifth forces and new particles from dark energy

12/13 PSI - String Theory Review Lecture 2