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Decoherence tests without quantum theory

Corsin Pfister
October 28, 2014

PIRSA:14100121
Quantum Foundations
PHYS 781 - Lecture 11

Niayesh Afshordi University of Waterloo

October 28, 2014

PIRSA:14100055
Entanglement entropy of Wilson loops: Holography and matrix models

Simon Gentle University of California, Los Angeles
October 28, 2014

PIRSA:14100006
Quantum Fields and Strings
Discovering the QCD Axion with Black Holes and Gravitational Waves

Masha Baryakhtar University of Washington
October 28, 2014

PIRSA:14100049
Particle Physics
Beyond slow-roll - Daan Meerburg
October 28, 2014

PIRSA:14100119
Cosmology
14/15 PSI - Conformal Field Theory - Lecture 14

Freddy Cachazo Perimeter Institute for Theoretical Physics

October 24, 2014

PIRSA:14100026
PHYS 781 - Lecture 10

Niayesh Afshordi University of Waterloo

October 24, 2014

PIRSA:14100064
14/15 PSI - Statistical Mechanics - Lecture 14

Anton Burkov University of Waterloo

October 24, 2014

PIRSA:14100102
14/15 PSI - Quantum Field Theory I (A) - Lecture 14
- Tibra Ali Perimeter Institute for Theoretical Physics
- Dan Wohns Perimeter Institute for Theoretical Physics
October 24, 2014

PIRSA:14100045
Non-Equilibrium Thermodynamics of a Gravitational Screen

Laurent Freidel Perimeter Institute for Theoretical Physics

October 23, 2014

PIRSA:14100110
Holographic Thermalization and Chaos

Luis Lehner Perimeter Institute for Theoretical Physics

October 23, 2014

PIRSA:14100108
Economic Inequality

Matteo Smerlak Capital Fund Management S.A.

October 23, 2014

PIRSA:14100109

Decoherence tests without quantum theory

Corsin Pfister
October 28, 2014

PIRSA:14100121
Quantum Foundations
In quantum theory, people have thought for some while about the problem of how to estimate the decoherence of a quantum channel from classical data gained in measurements. Applications of these developments include security criteria for quantum key distribution and tests of decoherence models. In this talk, I will present some ideas for how to interpret the same classical data to make statements about decoherence in cases where nature is not necessarily described by quantum theory. This is work in progress in collaboration with many people.
PHYS 781 - Lecture 11

Niayesh Afshordi University of Waterloo

October 28, 2014

PIRSA:14100055
Entanglement entropy of Wilson loops: Holography and matrix models

Simon Gentle University of California, Los Angeles
October 28, 2014

PIRSA:14100006
Quantum Fields and Strings
A half-BPS circular Wilson loop in maximally supersymmetric SU(N) Yang-Mills theory in an arbitrary representation is described by a Gaussian matrix model with a particular insertion. The additional entanglement entropy of a spherical region in the presence of such a loop was recently computed by Lewkowycz and Maldacena using exact matrix model results. In this talk I will utilise the supergravity solutions that are dual to such Wilson loops in large representations to calculate this entropy holographically. Employing the results of Gomis, Matsuura, Okuda and Trancanelli to express this holographic entanglement entropy in a matrix model language, I will demonstrate complete agreement with the formula derived by Lewkowycz and Maldacena.
Discovering the QCD Axion with Black Holes and Gravitational Waves

Masha Baryakhtar University of Washington
October 28, 2014

PIRSA:14100049
Particle Physics
In the next few years, Advanced LIGO will be the first experiment to detect gravitational waves. Through superradiance of stellar black holes, it may also be the first experiment to discover the QCD axion with decay constant around or above the GUT scale. When an axion's Compton wavelength is comparable to the size of a black hole, the axion binds to the black hole, forming a "gravitational atom". Due to superradiance, the number of axions occupying the bound levels grows exponentially, extracting energy and angular momentum from the black hole. I will discuss the promising gravitational wave signals from axions transitioning between levels of the gravitational atom and axions annihilating to gravitons. Events for axions in the range 10^−13 to 10^−10 eV can be visible at aLIGO. The signals produced are long-lasting, monochromatic, and can be distinguished from ordinary astrophysical sources. These signatures are also promising for lighter axions at future, lower-frequency, GW observatories. I will also present our updated exclusion on the QCD axion mass range of 6*10^−13 eV < ma < 1.5*10^−11 eV imposed by black hole spin measurements.
Beyond slow-roll - Daan Meerburg
October 28, 2014

PIRSA:14100119
Cosmology
We live in exciting times for cosmologists. There is a plethora of cosmological experiments that allow us to reconstruct the earliest moments in the Universe and test our ideas on how the Universe came into existence. Current data appear to favor an inflationary model that produces adiabatic, scale free, Gaussian fluctuations with an amplitude of 10^-5 in units of mK. WIthin the realm of cosmological models, it appears that such conditions are easily accomplished if we have a single light field slowly rolling down its potential. In this talk, I will investigate the possibility to what extend our current observations would allow for a deviation from slow-roll: several class of models predicts that the fluctuation spectra will contain superimposed features on top of their slow-roll solution. I will discuss these models and explain a novel way of extract these features from the data, both in the power spectrum as well as in the bispectrum. I will give the latest constraints from current cosmological surveys. In light of the possible detection of primordial gravitational waves, I will show that there exists evidence (3 sigma) that the data prefer a long wavelength feature driven by axion monodromy, a model that naturally predicts large tensor modes. From this I will derive a constraint on the axion decay constant. I will conclude with a discussion on how observations of higher order statistics and large scale structure could further constrain these models.
14/15 PSI - Conformal Field Theory - Lecture 14

Freddy Cachazo Perimeter Institute for Theoretical Physics

October 24, 2014

PIRSA:14100026
PHYS 781 - Lecture 10

Niayesh Afshordi University of Waterloo

October 24, 2014

PIRSA:14100064
14/15 PSI - Statistical Mechanics - Lecture 14

Anton Burkov University of Waterloo

October 24, 2014

PIRSA:14100102
14/15 PSI - Quantum Field Theory I (A) - Lecture 14
- Tibra Ali Perimeter Institute for Theoretical Physics
- Dan Wohns Perimeter Institute for Theoretical Physics
October 24, 2014

PIRSA:14100045
Non-Equilibrium Thermodynamics of a Gravitational Screen

Laurent Freidel Perimeter Institute for Theoretical Physics

October 23, 2014

PIRSA:14100110
Holographic Thermalization and Chaos

Luis Lehner Perimeter Institute for Theoretical Physics

October 23, 2014

PIRSA:14100108
Economic Inequality

Matteo Smerlak Capital Fund Management S.A.

October 23, 2014

PIRSA:14100109

Title	Date	Collection	Type	Info
Decoherence tests without quantum theory	2014‑10‑28	Quantum Foundations	Scientific Series	View details
PHYS 781 - Lecture 11	2014‑10‑28	PHYS 781 - Fundamentals of Astrophysics	Course	View details
Entanglement entropy of Wilson loops: Holography and matrix models	2014‑10‑28	Quantum Fields and Strings	Scientific Series	View details
Discovering the QCD Axion with Black Holes and Gravitational Waves	2014‑10‑28	Particle Physics	Scientific Series	View details
Beyond slow-roll - Daan Meerburg	2014‑10‑28	Cosmology and Gravitation	Scientific Series	View details
14/15 PSI - Conformal Field Theory - Lecture 14	2014‑10‑24	14/15 PSI - Conformal Field Theory	Course	View details
PHYS 781 - Lecture 10	2014‑10‑24	PHYS 781 - Fundamentals of Astrophysics	Course	View details
14/15 PSI - Statistical Mechanics - Lecture 14	2014‑10‑24	14/15 PSI - Statistical Mechanics	Course	View details
14/15 PSI - Quantum Field Theory I (A) - Lecture 14	2014‑10‑24	14/15 PSI - Quantum Field Theory	Course	View details
Non-Equilibrium Thermodynamics of a Gravitational Screen	2014‑10‑23		Conference	View details
Holographic Thermalization and Chaos	2014‑10‑23		Conference	View details
Economic Inequality	2014‑10‑23		Conference	View details

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