PIRSA:C06016 - Young Researchers Conference - 2006
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This event provides an opportunity for top young physicists to enjoy a multidisciplinary conference, and interact with resident scientists. In addition, participants will have an opportunity to learn more about Perimeter Institute.
Organizer(s): Justin Khoury
Collection URL: http://pirsa.org/C06016
Aspects of Nonlinear Perturbations in Cosmological Models
Abstract: I discuss two instances in which nonlinear perturbations in cosmological models are important. First, in de Sitter space-time, the bare necessity that the perturbations should be part of a consistent Taylor expansion of the field equations leads to the requirement, using the 'linearization stability...
read moreDate: 04/12/2006 - 9:00 am
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Brane Gravity in Six Dimensional Flux Compactifications
Abstract: I consider a six dimensional space-time, in which two of the dimensions are compactified by a flux. Matter can be localized on a codimension one brane coupled to the bulk gauge field and wrapped around an axis of symmetry of the internal space. By studying the linear perturbations around this backgr...
read moreDate: 04/12/2006 - 10:30 am
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Non-Isotropy of the CMB Power Spectrum in Single Field Inflation
Speaker(s):
Andreas Ross - University of Massachusetts Amherst
Abstract: At large scales the CMB spectrum measured by WMAP appears to have an anomalously low power of the quadrupole and an asymmetry of power at l < 40. We show that with an initial stage of fast roll of the inflation and a gradient in the initial conditions a simple chaotic inflation model may be capable ...
read moreDate: 04/12/2006 - 11:30 am
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Kappa Deformed Field Theory
Abstract: The description of noncommutative space will be given. I will show the relation between field theory on kappa-Minkowski space and the one in Minkowski. This construction leads to deformed energy momentum conservation law for energies close to the Planck scale.
Date: 04/12/2006 - 2:00 pm
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A Cosmological Sector in Loop Quantum Gravity
Abstract: A classical Hamiltonian system can be reduced to a subsystem of "relevant observables" using the pull-back under a Poisson embedding of the "relevant phase space" into the "full phase space". Since a quantum theory can be thought of a noncommutative phase space, one encounters the problem of the emb...
read moreDate: 04/12/2006 - 3:00 pm
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Emergence of a Background From Background Independent Quantum Gravity
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Date: 04/12/2006 - 4:30 pm
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Non-Gaussianities from Multi-Field Inflation
Abstract: Non-Gaussianities are a generic prediction of multi-field inflationary models and within reach of upcoming experiments. After reviewing current observational limits and the physical origin of a non-zero three point correlation function, I will discuss the possibility of detectable non-Gaussian signa...
read moreDate: 05/12/2006 - 9:00 am
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Bubble Nucleation and Eternal Inflation
Abstract: A number of mechanisms have been introduced in previous literature that might be responsible for transitions between metastable minima in a scalar field theory coupled to gravity. The connection between these transition mechanisms has remained unclear, and current formulations of eternal inflation o...
read moreDate: 05/12/2006 - 10:30 am
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Superluminal - scalar fields and cosmology
Speaker(s):
Alex Vikman - Ludwig-Maximilians University of Munich
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Date: 05/12/2006 - 11:30 am
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Nongeometric Flux Compactifications
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Date: 05/12/2006 - 1:30 pm
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Twistor-Inspired Approach to QCD and Supergravity
Abstract: We will discuss applications of the recently developed twistor-space methods in perturbative quantum field-theory. The two central topics will be 1) the unitarity bootstrap approach to hard scattering amplitudes in QCD and 2) the analysis of the UV structure of N=8 supergravity.
Date: 05/12/2006 - 2:30 pm
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The Arrow of Time, Black Holes, and Quantum Mixing of Large N Yang-Mills Theories
Abstract: Quantum gravity in an AdS space-time is described by an SU(N) Yang-Mills theory on a sphere, a bounded many-body system. We argue that in the high temperature phase the theory is intrinsically non-perturbative in the large N limit. At any nonzero value of the \'t Hooft coupling $lambda$, an exponent...
read moreDate: 05/12/2006 - 3:45 pm
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Similarities Between Maximally Supersymmetric Gauge and Gravity Theories
Abstract: Due to recent, as well as less recent, work on perturbative N=8 supergravity and N=4 super Yang-Mills in 4d, the two theories are appearing more and more closely related. These relations include similar "MHV-rule" constructions, one-loop structure and, perhaps, the same UV behavior, namely UV finite...
read moreDate: 05/12/2006 - 4:45 pm
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Children
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Date: 06/12/2006 - 8:30 am
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OPE of Giant Wilson loops from D-branes and Matrix Models
Abstract: In the context of AdS/CFT, it has been recently proposed that Wilson loops in higher representation of the gauge group have a dual description in terms of D-branes in AdS_5xS^5. After reviewing this new dictionary, I will present a computation of correlators between chiral primaries of N=4 SYM and W...
read moreDate: 06/12/2006 - 10:00 am
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Quantum Gravity from one-loop Super-Yang-Mills Theory
Abstract: It has been conjectured that maximally supersymmetric SU(N) Yang-Mills theory is dual to a String Theory on asymptotically AdS_5 times S^5 backgrounds. This is known as the AdS/CFT correspondence. In this talk I will show how using one-loop calculations in the gauge theory, one can study the emerge...
read moreDate: 06/12/2006 - 11:00 am
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Date: 06/12/2006 - 1:00 pm
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Fossil fuel CO2 and the onset of the next ice age.
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Date: 06/12/2006 - 2:00 pm
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Date: 06/12/2006 - 3:30 pm
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Aethereal Gravity
Abstract: Hints from quantum gravity suggest that a preferred frame may actually exist. One way to accommodate such a frame in general relativity without sacrificing diffeomorphism invariance is to couple the metric to a dynamical, time like, unit-norm vector field--the "aether". I will discuss properties an...
read moreDate: 06/12/2006 - 4:30 pm
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Observable Entanglement measures
Abstract: Although entanglement constitutes one of the most remarkable differences between classical and quantum mechanics, and entanglement does have directly observable consequences, entanglement is not a regular observable like momentum or energy. It is rather a non-linear functional of a typically large s...
read moreDate: 06/12/2006 - 4:30 pm
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Probability in the Everett interpretation: How to live without uncertainty
Abstract: The Everett (many-worlds) interpretation has made great progress over the past 20-30 years, largely due to the role of decoherence in providing a solution to the preferred basis problem. This makes it a serious candidate for a realist solution to the measurement problem. A remaining objection to the...
read moreDate: 07/12/2006 - 3:00 am
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Ancillae with Homogeneous Errors
Abstract: Ancillary state construction is a necessary component of quantum computing.
Ancillae are required both for error correction and for performing universal computation in a fault-tolerant way. Computation to an arbitrary accuracy, however, is effectively achieved by increasing the number of qubits i...
read moreDate: 07/12/2006 - 9:15 am
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The Distinguishability of Random Quantum States
Abstract: It is a fundamental property of quantum mechanics that non-orthogonal pure states cannot be distinguished with certainty, which leads to the following problem: Given a state picked at random from some ensemble, what is the maximum probability of success of determining which state we actually have? I...
read moreDate: 07/12/2006 - 10:20 am
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Additivity Conjectures in Quantum Information Theory
Abstract: Quantum information theory has two equivalent mathematical conjectures concerning quantum channels, which are also equivalent to other important conjectures concerning the entanglement. In this talk I explain these conjectures and introduce recent results.
Date: 07/12/2006 - 11:05 am
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Date: 07/12/2006 - 2:00 pm
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A Bell inequality Analogue in quantum measure theory
Speaker(s):
Joe Henson - Perimeter Institute for Theoretical Physics
Abstract: In stochastic treatments of the ERRB set-up, it is equivalent to impose Bell's inequalities, a local causality condition, or a certain "non-contextual hidden variables" condition. But these conditions are violated by quantum mechanics. On the other hand, it is possible to view quantum mechanics as...
read moreDate: 07/12/2006 - 4:30 pm
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Date: 08/12/2006 - 9:15 am
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Date: 08/12/2006 - 10:20 am
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Reliable Quantum State Estimation from Quantum Scoring Rules
Abstract: Inferring a quantum system's state, from repeated measurements, is critical for verifying theories and designing quantum hardware. It's also surprisingly easy to do wrong, as illustrated by maximum likelihood estimation (MLE), the current state of the art. I'll explain why MLE yields unreliable an...
read moreDate: 08/12/2006 - 11:05 am
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