Talks

9229 - 9240 of 16765 Results

From the Mathematics of Supersymmetry to the Music of Arnold Schoenberg

S. James Gates Jr. University of Maryland, College Park

June 04, 2014

PIRSA:14060048
How Much Information Can SUSY QM Conserve About SUSY QFT (Part-2)?

S. James Gates Jr. University of Maryland, College Park

June 04, 2014

PIRSA:14060005
Gauge fields in de Sitter space: antipodal symmetry and holography

Yasha Neiman Okinawa Institute of Science and Technology Graduate University

June 03, 2014

PIRSA:14060039

Quantum Fields and Strings
Some Conceptual Problems in General Relativity and Cosmology

Jayant Narlikar IUCAA - The Inter-University Centre for Astronomy and Astrophysics

June 03, 2014

PIRSA:14060004

Cosmology
Dynamical trapping near a quantum critical point

Emanuel Katz Boston University

May 30, 2014

PIRSA:14050116
Functional renormalization group and statistical mechanics of membranes

Omar Zanusso SISSA Scuola Internazionale Superiore di Studi Avanzati

May 30, 2014

PIRSA:14050115
Relativity of non relativistic systems

Federico Piazza Aix-Marseille University

May 30, 2014

PIRSA:14050113
Lattice models for anomalous field theories

John McGreevy University of California, San Diego

May 29, 2014

PIRSA:14050110
Spontaneous symmetry breaking, gravity, and spinning objects

Solomon Endlich Stanford University

May 29, 2014

PIRSA:14050111
Last gasp ‎of a black hole: why unitary evaporation must be non-monotonic

Matteo Smerlak Capital Fund Management S.A.

May 29, 2014

PIRSA:14050027

Quantum Gravity
Effective theories of vortex lines

Riccardo Penco University of Pennsylvania

May 29, 2014

PIRSA:14050103
Quantum matter without quasiparticles

Subir Sachdev Harvard University

May 29, 2014

PIRSA:14050109

From the Mathematics of Supersymmetry to the Music of Arnold Schoenberg

S. James Gates Jr. University of Maryland, College Park

June 04, 2014

PIRSA:14060048

The concept of supersymmetry, though never observed in nature, has driven a great deal of research in theoretical physics over the past several decades. Much has been learned through this research, but many unresolved questions remain. This presentation will describe how these questions can lead one down a surprising path: toward the dodecaphony of Austrian composer Arnold Schoenberg.
How Much Information Can SUSY QM Conserve About SUSY QFT (Part-2)?

S. James Gates Jr. University of Maryland, College Park

June 04, 2014

PIRSA:14060005

We provide additional evidence that supersymmetrical quantum mechanical systems can contain a remarkable amount of information about supersymmetrical field
theories in greater than one dimension.
Gauge fields in de Sitter space: antipodal symmetry and holography

Yasha Neiman Okinawa Institute of Science and Technology Graduate University

June 03, 2014

PIRSA:14060039

Quantum Fields and Strings

There is a proposed dS/CFT duality in 3+1 dimensions, with higher-spin gravity in the bulk subject to Bunch-Davies boundary conditions. I consider replacing these with antipodally symmetric conditions, which allow for real values of the bulk fields. I present spanning sets of solutions in global dS_4 for free gauge fields of all spins (including photons and gravitons), and use them to establish relations between antipodal symmetry and asymptotic behavior. Some of these relations can be extended to interacting theories, including ordinary and higher-spin gravity. I discuss the implications for antipodally symmetric dS/CFT.
Some Conceptual Problems in General Relativity and Cosmology

Jayant Narlikar IUCAA - The Inter-University Centre for Astronomy and Astrophysics

June 03, 2014

PIRSA:14060004

Cosmology

This talk will try to highlight some basic problems connected with conclusions uncritically drawn from well known works. These include: 1. The Schwarzschild solution 2. The formation of black holes by gravitational collapse 3. The no hair theorem 4. The principle of equivalence in the very early universe.
Dynamical trapping near a quantum critical point

Emanuel Katz Boston University

May 30, 2014

PIRSA:14050116

We consider a closed system where the parameter controlling a quantum phase transition is promoted to a dynamical field interacting with the quantum critical theory. In the case that the field has an energy extensive in the volume we can treat its evolution classically. We find that the field can become trapped near the phase transition point due to its interactions with the degrees of freedom of the quantum critical theory. The trapping/untrapping transition can be understood using Kibble-Zurek scaling arguments. We check the general framework numerically in the particular case of the 1D transverse field Ising chain, where the transverse magnetic field is dynamical. This constitutes a dynamical mechanism for tuning a relevant parameter to zero through a non-equilibrium process.
Functional renormalization group and statistical mechanics of membranes

Omar Zanusso SISSA Scuola Internazionale Superiore di Studi Avanzati

May 30, 2014

PIRSA:14050115

We will first review the rich variety of universality classes of membranes and the various models developed to describe their mechanical properties. We will then discuss the recent applications of the non-perturbative renormalization group to these models aimed at improving the understanding of the membranes' phase-space beyond the epsilon-expansion. Finally, we will comment on the implications of these results on various physical systems.
Relativity of non relativistic systems

Federico Piazza Aix-Marseille University

May 30, 2014

PIRSA:14050113

To the best of our knowledge, the fundamental laws of physics are Lorentz invariant. This means that condensed matter systems at finite density still display full Lorentz symmetry: it is just spontaneously broken (i.e. by state considered) and thus non-linearly realized. This simple observation allows to derive exact results about the spectrum of theories at finite charge density and suggests to classify condensed matter systems according to all the inequivalent ways in which boosts can be spontaneously broken.
Lattice models for anomalous field theories

John McGreevy University of California, San Diego

May 29, 2014

PIRSA:14050110
Spontaneous symmetry breaking, gravity, and spinning objects

Solomon Endlich Stanford University

May 29, 2014

PIRSA:14050111

Space-time symmetries are a crucial ingredient of any theoretical model in physics. Unlike internal symmetries, which may or may not be gauged and/or spontaneously broken, space-time symmetries do not admit any ambiguity: they are gauged by gravity, and any conceivable physical system (other than the vacuum) is bound to break at least some of them. Motivated by this observation, I will sketch how to couple gravity with the Goldstone fields that non-linearly realize spontaneously broken space-time symmetries by weakly gauging the Poincare symmetry group in the context of the coset construction. To illustrate the power of this perspective I will build a low energy effective action that describes spinning objects coupled to gravity and describe its interpretation.
Last gasp ‎of a black hole: why unitary evaporation must be non-monotonic

Matteo Smerlak Capital Fund Management S.A.

May 29, 2014

PIRSA:14050027

Quantum Gravity

I will describe the relationship between radiated energy and entanglement entropy of massless fields at future null infinity (the "Page curve") in two-dimensional models of black hole evaporation. ‎I will use this connection to derive a general feature of any unitary-preserving evaporation scenario: the Bondi mass of the hole must be non-monotonic. Time permitting, I will comment on time scales in such scenarios.
Effective theories of vortex lines

Riccardo Penco University of Pennsylvania

May 29, 2014

PIRSA:14050103

Vortex lines are a distinctive feature of superfluids and are characterized by a very peculiar dynamics. In this talk, I will first discuss the behavior of vortex lines in a non-relativistic superfluids in the incompressible limit. I will then introduce an effective theory of vortex lines coupled to sound which applies to relativistic superfluids. I will conclude by briefly discussing the similarities between the effective theory for vortex lines and non-relativistic General Relativity.
Quantum matter without quasiparticles

Subir Sachdev Harvard University

May 29, 2014

PIRSA:14050109

Modern materials abound in systems to which the quasiparticle picture does not apply, and developing their theoretical description remains an important challenge in condensed matter physics. I will describe recent progress in understanding the dynamics of two systems without quasiparticles: (i) ultracold atoms in optical lattices, and (ii) the nematic quantum critical point of metals with applications to the `strange metal’ found in the high temperature superconductors. A combination of field-theoretic, holographic, and numerical methods will be used.

Title	Date	Collection	Type	Info
From the Mathematics of Supersymmetry to the Music of Arnold Schoenberg	2014‑06‑04	Public Lecture Series	Public Lectures	View details
How Much Information Can SUSY QM Conserve About SUSY QFT (Part-2)?	2014‑06‑04	Colloquium	Scientific Series	View details
Gauge fields in de Sitter space: antipodal symmetry and holography	2014‑06‑03	Quantum Fields and Strings	Scientific Series	View details
Some Conceptual Problems in General Relativity and Cosmology	2014‑06‑03	Cosmology and Gravitation	Scientific Series	View details
Dynamical trapping near a quantum critical point	2014‑05‑30	Low Energy Challenges for High Energy Physicists	Conference	View details
Functional renormalization group and statistical mechanics of membranes	2014‑05‑30	Low Energy Challenges for High Energy Physicists	Conference	View details
Relativity of non relativistic systems	2014‑05‑30	Low Energy Challenges for High Energy Physicists	Conference	View details
Lattice models for anomalous field theories	2014‑05‑29	Low Energy Challenges for High Energy Physicists	Conference	View details
Spontaneous symmetry breaking, gravity, and spinning objects	2014‑05‑29	Low Energy Challenges for High Energy Physicists	Conference	View details
Last gasp ‎of a black hole: why unitary evaporation must be non-monotonic	2014‑05‑29	Quantum Gravity	Scientific Series	View details
Effective theories of vortex lines	2014‑05‑29	Low Energy Challenges for High Energy Physicists	Conference	View details
Quantum matter without quasiparticles	2014‑05‑29	Low Energy Challenges for High Energy Physicists	Conference	View details

Format results