17833 - 17844 of 17905 Results
Format results
-
Statistical Aspects of Semi-Classical Quantum Gravity
Luca Bombelli - University of Mississippi
Is a past finite order the inner basis of space-time?
Rafael Sorkin - Perimeter Institute for Theoretical Physics
The Problem of Dynamics in Quantum Gravity
John Baez - University of California, Riverside
Physical Ramifications of Quantum Geometry
John Baez - University of California, Riverside
About Semi-Classical Quantum Gravity
Alejandro Corichi - National Autonomous University of Mexico
Two Dimensional Strings, Matrix Models and the Rolling Tachyon
Gautam Mandal - Tata Institute of Fundamental Research (TIFR)
Contextuality for Preparations, Transformations, and Unsharp Measurements
Robert Spekkens - Perimeter Institute for Theoretical Physics
Structure formation beyond the standard paradigm
Stefan Hofmann - Ludwig-Maximilians-Universität München (LMU)
Fingerprints of the early universe
Hiranya Peiris - University of Cambridge
I will review recent progress in testing with cosmological data the inflationary hypothesis for describing the very early universe. I will present snapshots of different aspects of confronting the theory with data, including a \'bottom-up\' approach: the latest results from a systematic…
Interpreting recent dark matter hints
Jure Zupan - University of Cincinnati
Recent PAMELA and ATIC results may represent a breakthrough in dark matter searches beyond its gravitational imprint. After briefly reviewing the possible (classes of) explanations for the observed excesses in positron and electron cosmic ray fluxes I will focus on a two component dark matter model…
Doing physics with non-diagonalizable Hamiltonians and the solution to the ghost problem in fourth-order derivative theories
Philip Mannheim - University of Connecticut
It has long been thought that theories based on equations of motion possessing derivatives of order higher than second are not unitary. Specifically, they are thought to possess unphysical ghost states with negative norm. However, it turns out that the appropriate Hilbert space for such theories had…
Cosmic Ray experiments and Lorentz Invariance Violations.
As well known, cosmic ray experiments can put strong constraints on possible Lorentz Invariance Violations. In particular, the presence of the so called GZK \'cut-off\' may indicate that protons do propagate in the Universe as expected from relativistic invariance. The presence of this feature in…
Astrophysics and Cosmology through Problems - 13B
Mark Wyman - PDT Partners LLC , Niayesh Afshordi - University of Waterloo
This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various…
Astrophysics and Cosmology through Problems - 13A
Mark Wyman - PDT Partners LLC , Niayesh Afshordi - University of Waterloo
This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various…
Hybrid quantum information processing and communication
Peter van Loock - University of Erlangen-Nuremberg
With the aim of proposing feasible, quantum optical realizations of quantum information protocols and minimizing the resource costs in such implementations, we will discuss various, so-called hybrid approaches. These include, for instance, schemes based upon both discrete and continuous quantum…
Quantum Field Theory 1 - Lecture 12B
Volodya Miransky - Western University
Quantum Field Theory I course taught by Volodya Miransky of the University of Western Ontario
New Superconductors
Catherine Kallin - McMaster University
The discovery and understanding of superconductivity has provided important paradigms for physics, including spontaneous gauge symmetry breaking and the Anderson-Higgs mechanism. More recent discoveries in superconductivity have given us examples of doped Mott insulators, still an unsolved…
Computing Black Hole entropy in LQG from a CFT perspective
Ivan Agullo - Louisiana State University
Motivated by the analogy proposed by Witten between Chern-Simons theories and CFT-Wess-Zumino-Witten models, we explore a new way of computing the entropy of a black hole starting from the isolated horizon framework in Loop Quantum Gravity. The results seem to indicate that this analogy can work in…
Quantum Field Theory 1 - Lecture 12A
Volodya Miransky - Western University
Quantum Field Theory I course taught by Volodya Miransky of the University of Western Ontario