Talks

10597 - 10608 of 16754 Results

12/13 PSI - Found Quantum Mechanics Lecture 14

Robert Spekkens Perimeter Institute for Theoretical Physics

January 24, 2013

PIRSA:13010083

Quantum Fields and Strings
12/13 PSI - String Theory Review Lecture 14

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

January 24, 2013

PIRSA:13010064

Quantum Fields and Strings
12/13 PSI - Standard Model Review Lecture 14

Mark Wise California Institute of Technology (Caltech)

January 24, 2013

PIRSA:13010041

Particle Physics
What is motion? What is time?

Flavio Mercati University of Naples Federico II

January 23, 2013

PIRSA:13010003

Quantum Gravity
12/13 PSI - Found Quantum Mechanics Lecture 13

Robert Spekkens Perimeter Institute for Theoretical Physics

January 23, 2013

PIRSA:13010082

Quantum Fields and Strings
12/13 PSI - String Theory Review Lecture 13

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

January 23, 2013

PIRSA:13010063

Quantum Fields and Strings
12/13 PSI - Standard Model Review Lecture 13

Mark Wise California Institute of Technology (Caltech)

January 23, 2013

PIRSA:13010040

Particle Physics
Advanced General Relativity - Lecture 1

Rafael Sorkin Perimeter Institute for Theoretical Physics

January 22, 2013

PIRSA:13010006
Superfluid to normal phase transition in strongly interacting bosons in two and three dimensions.

Juan Carrasquilla ETH Zurich

January 22, 2013

PIRSA:13010107

Condensed Matter
A monodromy defect in the 3d Ising model.

Roberto Pellegrini National Institute for Nuclear Physics

January 22, 2013

PIRSA:13010106

Quantum Fields and Strings
12/13 PSI - Found Quantum Mechanics Lecture 12

Robert Spekkens Perimeter Institute for Theoretical Physics

January 22, 2013

PIRSA:13010081

Quantum Fields and Strings
Holographic description of cosmological singularity

Misha Smolkin Hebrew University of Jerusalem

January 22, 2013

PIRSA:13010111

Cosmology

12/13 PSI - Found Quantum Mechanics Lecture 14

Robert Spekkens Perimeter Institute for Theoretical Physics

January 24, 2013

PIRSA:13010083

Quantum Fields and Strings
12/13 PSI - String Theory Review Lecture 14

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

January 24, 2013

PIRSA:13010064

Quantum Fields and Strings
12/13 PSI - Standard Model Review Lecture 14

Mark Wise California Institute of Technology (Caltech)

January 24, 2013

PIRSA:13010041

Particle Physics
What is motion? What is time?

Flavio Mercati University of Naples Federico II

January 23, 2013

PIRSA:13010003

Quantum Gravity

I give an account of the Machian approach to dynamics, from Mach's critique of Newton to the work of Barbour, Bertotti, York and O'Murchadha, which culminated in the theory of Shape Dynamics, a new and original way of thinking about General Relativity. I conclude commenting on the present research lines in Shape Dynamics, and the opportunity it offers to solve the problem of time in quantum gravity.

Support for this colloquium is provided by The Templeton Frontiers Program.
12/13 PSI - Found Quantum Mechanics Lecture 13

Robert Spekkens Perimeter Institute for Theoretical Physics

January 23, 2013

PIRSA:13010082

Quantum Fields and Strings
12/13 PSI - String Theory Review Lecture 13

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

January 23, 2013

PIRSA:13010063

Quantum Fields and Strings
12/13 PSI - Standard Model Review Lecture 13

Mark Wise California Institute of Technology (Caltech)

January 23, 2013

PIRSA:13010040

Particle Physics
Advanced General Relativity - Lecture 1

Rafael Sorkin Perimeter Institute for Theoretical Physics

January 22, 2013

PIRSA:13010006
Superfluid to normal phase transition in strongly interacting bosons in two and three dimensions.

Juan Carrasquilla ETH Zurich

January 22, 2013

PIRSA:13010107

Condensed Matter

Using quantum Monte Carlo simulations, we investigate the finite-temperature phase diagram of hard-core bosons (XY model) in two- and three-dimensional square lattices. To determine the phase boundaries, we perform a finite-size scaling analysis of the condensate fraction and/or the superfluid stiffness. We then discuss how this diagrams can be measured in experiments with trapped ultracold gases, where the systems are inhomogeneous. For that, we introduce a method based on the measurement of the zero-momentum occupation, which is adequate for experiments dealing with both homogeneous and trapped systems. Finally, we provide an analytical argument that demonstrates that the Bose-Hubbard model does not exhibit ﬁnite-temperature BEC in two dimensions, provided that density remains finite across the entire system in the thermodynamic limit.
A monodromy defect in the 3d Ising model.

Roberto Pellegrini National Institute for Nuclear Physics

January 22, 2013

PIRSA:13010106

Quantum Fields and Strings

A conformal defect is a d-dimensional geometrical object that breaks the SO(D+1,1) symmetry, of a D-dimensional conformal field theory, down to those transformations that leave the defect invariant i.e. SO(D-d) X SO(d+1,1).
We studied the 3D critical Ising model in presence of a special kind of these defects, a monodromy line defect.
In particular we computed, using Montecarlo simulations, the anomalous dimensions of the lowest dimensional operators living at the defect, as well as correlation functions of operators in the bulk with operators at the defect.
We found a good agreement between our results and the expectations of conformal field theory.
12/13 PSI - Found Quantum Mechanics Lecture 12

Robert Spekkens Perimeter Institute for Theoretical Physics

January 22, 2013

PIRSA:13010081

Quantum Fields and Strings
Holographic description of cosmological singularity

Misha Smolkin Hebrew University of Jerusalem

January 22, 2013

PIRSA:13010111

Cosmology

In my talk I will discuss our recent paper hep-th/1211.1322 where we construct a 3D conformal field theory dual to asymptotically AdS cosmology in four dimensions. Due to the scale invariance this dual theory allows an infinite family of instantons each of which breaks the conformal group O(3,2) down to O(3,1). These instantons are dual to bulk instantons responsible for nucleating an O(3,1) invariant cosmological bubble. Presumably they indicate an infinite instability rate, however we are able to sum over all of them completely. The resulting theory is manifestly stable, unitary and finite.

Title	Date	Collection	Type	Info
12/13 PSI - Found Quantum Mechanics Lecture 14	2013‑01‑24	12/13 PSI - Found Quantum Mechanics	Course	View details
12/13 PSI - String Theory Review Lecture 14	2013‑01‑24	12/13 PSI - String Theory Review	Course	View details
12/13 PSI - Standard Model Review Lecture 14	2013‑01‑24	12/13 PSI - Standard Model Review	Course	View details
What is motion? What is time?	2013‑01‑23	Colloquium	Scientific Series	View details
12/13 PSI - Found Quantum Mechanics Lecture 13	2013‑01‑23	12/13 PSI - Found Quantum Mechanics	Course	View details
12/13 PSI - String Theory Review Lecture 13	2013‑01‑23	12/13 PSI - String Theory Review	Course	View details
12/13 PSI - Standard Model Review Lecture 13	2013‑01‑23	12/13 PSI - Standard Model Review	Course	View details
Advanced General Relativity - Lecture 1	2013‑01‑22	Elements of General Relativity	Course	View details
Superfluid to normal phase transition in strongly interacting bosons in two and three dimensions.	2013‑01‑22	Quantum Matter	Scientific Series	View details
A monodromy defect in the 3d Ising model.	2013‑01‑22	Quantum Fields and Strings	Scientific Series	View details
12/13 PSI - Found Quantum Mechanics Lecture 12	2013‑01‑22	12/13 PSI - Found Quantum Mechanics	Course	View details
Holographic description of cosmological singularity	2013‑01‑22	Cosmology and Gravitation	Scientific Series	View details

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