Talks

9493 - 9504 of 18375 Results

14/15 PSI - Special Functions 2

Dan Wohns Perimeter Institute for Theoretical Physics

August 20, 2014

PIRSA:14080021
TBA

Senthil Todadri Massachusetts Institute of Technology (MIT) - Department of Physics

August 19, 2014

PIRSA:14080036

Condensed Matter
Classical statistics: resolving paradoxes since 1749

August 19, 2014

PIRSA:14080005
14/15 PSI - Yakir Aharonov

Yakir Aharonov Chapman University

August 19, 2014

PIRSA:14080040
Towards construction of a Wightman QFT in four dimensions

Raimar Wulkenhaar Westfälische Wilhelms-Universität Münster

August 19, 2014

PIRSA:14080037
14/15 PSI - Quantum Mechanics 1

Agata Branczyk IBM (Canada)

August 19, 2014

PIRSA:14080024
14/15 PSI - Special Functions 1

Dan Wohns Perimeter Institute for Theoretical Physics

August 19, 2014

PIRSA:14080020
14/15 PSI - Classical Mechanics 4

David Kubiznak Charles University

August 15, 2014

PIRSA:14080018
14/15 PSI - Complex Analysis 4

Tibra Ali Perimeter Institute for Theoretical Physics

August 15, 2014

PIRSA:14080012
14/15 PSI - Classical Mechanics 3

David Kubiznak Charles University

August 14, 2014

PIRSA:14080016
14/15 PSI - Complex Analysis 3

Tibra Ali Perimeter Institute for Theoretical Physics

August 14, 2014

PIRSA:14080011
CMB anomalies from primordial gravitational waves

Yi Wang Hong Kong University of Science and Technology

August 13, 2014

PIRSA:14080019

Astrophysics

14/15 PSI - Special Functions 2

Dan Wohns Perimeter Institute for Theoretical Physics

August 20, 2014

PIRSA:14080021
TBA

Senthil Todadri Massachusetts Institute of Technology (MIT) - Department of Physics

August 19, 2014

PIRSA:14080036

Condensed Matter
Classical statistics: resolving paradoxes since 1749

August 19, 2014

PIRSA:14080005

There has been renewed interest in the effect that pre and postselection has on the foundations of quantum theory. Often, but not solely, in conjunction with weak measurement, pre and postselection scenarios are said to simultaneous create and resolve paradoxes. These paradoxes are said to be profound quandaries which bring us closer to the resolving the mysteries of the quantum. Here I was show that the same effects are present in classical physics when postselection and disturbance are allowed. In particular, I will demonstrate that anomalous weak values and protective measurements are already present in classical theory, thereby showing that these effects do not represent something uniquely quantum nor something that ought to be thought of as paradoxical. This is joint work with Josh Combes and Matt Leifer.
14/15 PSI - Yakir Aharonov

Yakir Aharonov Chapman University

August 19, 2014

PIRSA:14080040
Towards construction of a Wightman QFT in four dimensions

Raimar Wulkenhaar Westfälische Wilhelms-Universität Münster

August 19, 2014

PIRSA:14080037

We prove that the $\lambda\phi^4_4$ quantum field theory on noncommutative Moyal space is, in the limit of infinite noncommutativity, exactly solvable in terms of the solution of a non-linear integral equation. The proof involves matrix model techniques which might be relevant for 2D quantum gravity and its generalisation to coloured tensor models of rank $\geq 3$. Surprisingly, our limit describes Schwinger functions of a Euclidean quantum field theory on standard $\mathbb{R}^4$ which satisfy the easy Osterwalder-Schrader axioms boundedness, covariance and symmetry. We prove that the decisive reflection positivity axiom is, for the 2-point function, equivalent to the question whether or not the solution of the integral equation is a Stieltjes function. The numerical solution of the integral equation leaves no doubt that this is true for coupling constants $\lambda\in[-0.39,0]$.
14/15 PSI - Quantum Mechanics 1

Agata Branczyk IBM (Canada)

August 19, 2014

PIRSA:14080024
14/15 PSI - Special Functions 1

Dan Wohns Perimeter Institute for Theoretical Physics

August 19, 2014

PIRSA:14080020
14/15 PSI - Classical Mechanics 4

David Kubiznak Charles University

August 15, 2014

PIRSA:14080018
14/15 PSI - Complex Analysis 4

Tibra Ali Perimeter Institute for Theoretical Physics

August 15, 2014

PIRSA:14080012
14/15 PSI - Classical Mechanics 3

David Kubiznak Charles University

August 14, 2014

PIRSA:14080016
14/15 PSI - Complex Analysis 3

Tibra Ali Perimeter Institute for Theoretical Physics

August 14, 2014

PIRSA:14080011
CMB anomalies from primordial gravitational waves

Yi Wang Hong Kong University of Science and Technology

August 13, 2014

PIRSA:14080019

Astrophysics

We relate CMB anomalies and the recent observational evidence of primordial gravitational
waves. Two aspects are investigated:

(a) Several anomalies are spotted on the low ell temperature map of the WMAP and Planck
experiments. However, those anomalies disappear at high ell. We propose that those low ell
temperature anomalies may come from nearly scale invariant anomalies of the tensor sector.
Those anomalies on the temperature map naturally decay towards small scales, characterized
by the tensor-to-temperature radiation transfer function.

(b) The anomalies introduced by the gravitational waves discovery. Strong tension is noticed
between the BICEP2 and Planck data. We study in detail how blue tilt of the tensor spectrum
reconciles the tension between those datasets.

Title	Date	Collection	Type	Info
14/15 PSI - Special Functions 2	2014‑08‑20	14/15 PSI - Front End	Course	View details
TBA	2014‑08‑19	Quantum Matter	Scientific Series	View details
Classical statistics: resolving paradoxes since 1749	2014‑08‑19	Quantum Foundations	Scientific Series	View details
14/15 PSI - Yakir Aharonov	2014‑08‑19	14/15 PSI - Front End	Other	View details
Towards construction of a Wightman QFT in four dimensions	2014‑08‑19	Quantum Gravity	Scientific Series	View details
14/15 PSI - Quantum Mechanics 1	2014‑08‑19	14/15 PSI - Front End	Course	View details
14/15 PSI - Special Functions 1	2014‑08‑19	14/15 PSI - Front End	Course	View details
14/15 PSI - Classical Mechanics 4	2014‑08‑15	14/15 PSI - Front End	Course	View details
14/15 PSI - Complex Analysis 4	2014‑08‑15	14/15 PSI - Front End	Other	View details
14/15 PSI - Classical Mechanics 3	2014‑08‑14	14/15 PSI - Front End	Course	View details
14/15 PSI - Complex Analysis 3	2014‑08‑14	14/15 PSI - Front End	Other	View details
CMB anomalies from primordial gravitational waves	2014‑08‑13		Scientific Series	View details

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Format results

14/15 PSI - Special Functions 2

TBA

Classical statistics: resolving paradoxes since 1749

14/15 PSI - Yakir Aharonov

Towards construction of a Wightman QFT in four dimensions

14/15 PSI - Quantum Mechanics 1

14/15 PSI - Special Functions 1

14/15 PSI - Classical Mechanics 4

14/15 PSI - Complex Analysis 4

14/15 PSI - Classical Mechanics 3

14/15 PSI - Complex Analysis 3

CMB anomalies from primordial gravitational waves

14/15 PSI - Special Functions 2

TBA

Classical statistics: resolving paradoxes since 1749

14/15 PSI - Yakir Aharonov

Towards construction of a Wightman QFT in four dimensions

14/15 PSI - Quantum Mechanics 1

14/15 PSI - Special Functions 1

14/15 PSI - Classical Mechanics 4

14/15 PSI - Complex Analysis 4

14/15 PSI - Classical Mechanics 3

14/15 PSI - Complex Analysis 3

CMB anomalies from primordial gravitational waves