The Clock and the Quantum - Panel Discussion 1
Chris Fuchs - University of Massachusetts Boston
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Astrophysics and Cosmology through Problems - 5B
Mark Wyman - PDT Partners LLC , Niayesh Afshordi - University of Waterloo
On the reality of time and the evolution of laws
Lee Smolin - Perimeter Institute for Theoretical Physics
Astrophysics and Cosmology through Problems - 5A
Mark Wyman - PDT Partners LLC , Niayesh Afshordi - University of Waterloo
Theory Confirmation in One World and its Failure in Many
Adrian Kent - University of Cambridge
Solved and unsolved problems of time in quantum gravity
Rafael Sorkin - Perimeter Institute for Theoretical Physics
Before the Big Bang: Is There Evidence For Something And If So, What?
Roger Penrose - University of Oxford
Was Spacetime a Glorious Historical Accident?
Julian Barbour - University of Oxford
Time and the big bang
Neil Turok - University of Edinburgh
Causality and Information Flow in Quantum Protocols
Samson Abramsky - University of Oxford
Searching for Tensor modes from Inflation
Martin Bucher - French National Centre for Scientific Research (CNRS)
An Experimentalist\'s Perspective on Testing Field Theories with the CMB
Lyman Page - Princeton University
Learning about topological quantum memory
Lucy Liuxuan Zhang - University of Maryland, College Park
I will introduce Kitaev's suface codes as a block quantum error-correcting code. Recovery procedures will be described in the case of imperfect syndrome measurements. More might be covered if time permits.
Renormalization Group Flow
Joel Brownstein - University of Utah
ABSTRACT: The asymptotic freedom conjecture for gravitation is explored in which strong renormalization effects (as in QCD) may occur at astrophysical distance scales larger than the solar system. Nonperturbative renormalization group trajectories exhibiting such an infrared fixed point describe a…
Entanglement Entropy in Loop Quantum Gravity
The entanglement entropy between quantum fields inside and outside a black hole horizon is a promising candidate for the microscopic origin of black hole entropy. I will explain the motivation behind this interpretation of black hole entropy, and why it requires quantum gravity. I will then apply…
UV Caps for 6D Gauged Chiral Supergravity
Doug Hoover - Western University
I will discuss recent results in Supersymmetric Large Extra Dimensions (SLED), a scenario which shows promise towards solving both the hierarchy and the cosmological constant problems. One of the issues which arises in this programme is a direct result of the need to use codimension-2 branes, which…
Penroses Space of Quantized Directions
Isabeau Prémont-Schwarz - McGill University
In the sixties, Roger Penrose came up with a radical new idea for a quantum geometry which would be entirely background independent, combinatorial, discrete (countable number of degrees of freedom), and involve only integers and fractions, not complex or real numbers. The basic structures are spin…
Propagation and interaction of topological invariants on embedded 4-valient spinets
Yidun Wan - Fudan University
The study of particle-like excitations of quantum gravitational fields in loop quantum gravity is extended to the case of four valent graphs and the corresponding natural evolution moves based on the dual Pachner moves. This makes the results applicable to spin foam models. We find that some braids…
(2+1) Gravity and Chern-Simons Theory.
Sean Gryb - University of Groningen
In the late 80s it became clear through notable work by Witten and others that there is a deep connection between (2+1) gravity and Chern-Simons theory making it possible to quantize. In the case where the cosmological constant is negative, spacetime has a boundary and classically there are black…