Talks

13057 - 13068 of 20114 Results

Statistical Mechanics - Lecture 10

John Berlinsky McMaster University

November 23, 2012

PIRSA:12110030
Quantum Field Theory 2 - Lecture 10

Francois David CEA Saclay

November 23, 2012

PIRSA:12110011

High Energy Physics
Dynamical Capture Compact Binary Mergers

William East Perimeter Institute for Theoretical Physics

November 22, 2012

PIRSA:12110054

General Relativity & Quantum Cosmology
Holography for inflation using conformal perturbation theory.

Paul McFadden Durham University

November 22, 2012

PIRSA:12110078

Astrophysics
Statistical Mechanics - Lecture 9

John Berlinsky McMaster University

November 22, 2012

PIRSA:12110029
Quantum Field Theory 2 - Lecture 9

Francois David CEA Saclay

November 22, 2012

PIRSA:12110010

High Energy Physics
Twisted quantum double model of topological phases

Yidun Wan Fudan University

November 21, 2012

PIRSA:12110079

Condensed Matter
Quantum Signatures of Chaos

Shohini Ghose Wilfrid Laurier University

November 21, 2012

PIRSA:12110072
Twisted quantum double model of topological phases

Yidun Wan Fudan University

November 21, 2012

PIRSA:12110077

Condensed Matter
Statistical Mechanics - Lecture 8

John Berlinsky McMaster University

November 21, 2012

PIRSA:12110028
Quantum Field Theory 2 - Lecture 8

Francois David CEA Saclay

November 21, 2012

PIRSA:12110009

High Energy Physics
Principle of relativity for quantum theory

Marco Zaopo University of Pavia

November 20, 2012

PIRSA:12110073

Quantum Physics

Statistical Mechanics - Lecture 10

John Berlinsky McMaster University

November 23, 2012

PIRSA:12110030
Quantum Field Theory 2 - Lecture 10

Francois David CEA Saclay

November 23, 2012

PIRSA:12110011

High Energy Physics
Dynamical Capture Compact Binary Mergers

William East Perimeter Institute for Theoretical Physics

November 22, 2012

PIRSA:12110054

General Relativity & Quantum Cosmology
Holography for inflation using conformal perturbation theory.

Paul McFadden Durham University

November 22, 2012

PIRSA:12110078

Astrophysics

Holographic cosmology maps cosmological time evolution to the inverse RG ﬂow of a dual three-dimensional QFT. In cases where this RG ﬂow connects two closely separated ﬁxed points, QFT correlators may be calculated perturbatively in terms of the conformal ﬁeld theory associated with one of the ﬁxed points, even when the dual QFT is at strong coupling. Realising slow-roll inﬂation in these terms, we show how to derive standard slow-roll inﬂationary power spectra and non-Gaussianities through purely holographic calculations. The form of slow-roll inﬂationary correlators is seen to be determined by the perturbative breaking of conformal symmetry away from the ﬁxed point.
Statistical Mechanics - Lecture 9

John Berlinsky McMaster University

November 22, 2012

PIRSA:12110029
Quantum Field Theory 2 - Lecture 9

Francois David CEA Saclay

November 22, 2012

PIRSA:12110010

High Energy Physics
Twisted quantum double model of topological phases

Yidun Wan Fudan University

November 21, 2012

PIRSA:12110079

Condensed Matter
Quantum Signatures of Chaos

Shohini Ghose Wilfrid Laurier University

November 21, 2012

PIRSA:12110072
Twisted quantum double model of topological phases

Yidun Wan Fudan University

November 21, 2012

PIRSA:12110077

Condensed Matter
Statistical Mechanics - Lecture 8

John Berlinsky McMaster University

November 21, 2012

PIRSA:12110028
Quantum Field Theory 2 - Lecture 8

Francois David CEA Saclay

November 21, 2012

PIRSA:12110009

High Energy Physics
Principle of relativity for quantum theory

Marco Zaopo University of Pavia

November 20, 2012

PIRSA:12110073

Quantum Physics

In a generic quantum experiment we have a given set of devices analyzing some physical property of a system. To each device involved in the experiment we associate a set of random outcomes corresponding to the possible values of the variable analyzed by the device. Devices have apertures that permit physical systems to pass through them. Each aperture is labelled as "input" or "output" depending on whether it is assumed that the aperture lets the system go inside or outside the device. Assuming a particular input/output structure for the devices involved in a generic experiment is equivalent to assume a particular causal structure for the space-time events constituted by the outcomes happening on devices. The joint probability distribution of these outcomes is usually predicted assuming an absolutely defined input/output structure of devices. This means that all observers of the experiment agree on whether an aperture is labelled as "input" or "output". In this talk we show that the mathematical formalism of quantum theory permits to predict the joint probability distribution of outcomes in a generic experiment in such a way that the input/output structure is indeed relative to an observer. This means that two observers of the same experiment can predict the joint probability distribution of outcomes assuming different input/output labels for the apertures. Since input/output structure is the causal structure of the space-time events constituting the outcomes involved in the experiment we conclude that in quantum theory, the causal structure of events may not be regarded as absolute but rather as relative to the observer. We finally point out that properly extending this concept to the cosmological domain could shed light on the problem of dark energy.

Title	Date	Collection	Type	Info
Statistical Mechanics - Lecture 10	2012‑11‑23	12/13 PSI - Statistical Mechanics	Course	View details
Quantum Field Theory 2 - Lecture 10	2012‑11‑23	12/13 PSI - Quantum Field Theory 2	Course	View details
Dynamical Capture Compact Binary Mergers	2012‑11‑22	Strong Gravity	Scientific Series	View details
Holography for inflation using conformal perturbation theory.	2012‑11‑22	Cosmology and Gravitation	Scientific Series	View details
Statistical Mechanics - Lecture 9	2012‑11‑22	12/13 PSI - Statistical Mechanics	Course	View details
Quantum Field Theory 2 - Lecture 9	2012‑11‑22	12/13 PSI - Quantum Field Theory 2	Course	View details
Twisted quantum double model of topological phases	2012‑11‑21	Quantum Matter	Scientific Series	View details
Quantum Signatures of Chaos	2012‑11‑21	Colloquium	Scientific Series	View details
Twisted quantum double model of topological phases	2012‑11‑21	Quantum Matter	Other	View details
Statistical Mechanics - Lecture 8	2012‑11‑21	12/13 PSI - Statistical Mechanics	Course	View details
Quantum Field Theory 2 - Lecture 8	2012‑11‑21	12/13 PSI - Quantum Field Theory 2	Course	View details
Principle of relativity for quantum theory	2012‑11‑20	Quantum Foundations	Scientific Series	View details

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Format results

Statistical Mechanics - Lecture 10

Quantum Field Theory 2 - Lecture 10

Dynamical Capture Compact Binary Mergers

Holography for inflation using conformal perturbation theory.

Statistical Mechanics - Lecture 9

Quantum Field Theory 2 - Lecture 9

Twisted quantum double model of topological phases

Quantum Signatures of Chaos

Twisted quantum double model of topological phases

Statistical Mechanics - Lecture 8

Quantum Field Theory 2 - Lecture 8

Principle of relativity for quantum theory

Statistical Mechanics - Lecture 10

Quantum Field Theory 2 - Lecture 10

Dynamical Capture Compact Binary Mergers

Holography for inflation using conformal perturbation theory.

Statistical Mechanics - Lecture 9

Quantum Field Theory 2 - Lecture 9

Twisted quantum double model of topological phases

Quantum Signatures of Chaos

Twisted quantum double model of topological phases

Statistical Mechanics - Lecture 8

Quantum Field Theory 2 - Lecture 8

Principle of relativity for quantum theory