Format results
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Fun with dark energy
Andreas Albrecht - University of California, Davis
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MOND habitats within the solar system
Joao Magueijo - Imperial College London
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Why did the universe start from a low entropy state
Laura Mersini-Houghton - University of North Carolina at Chapel Hill
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Cosmic superstrings: observable relics of brane inflation
Mark Wyman - PDT Partners LLC
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Generating scale-invaraint power spectrum in string gas cosmology
Ali Nayeri - Chapman University
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Gravity and cosmology of the dilaton at "strong coupling"
Federico Piazza - Aix-Marseille University
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Inflation model building and cosmic microwave background
Kenji Kadota - Nagoya University
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A talk about Nothing
John McGreevy - University of California, San Diego
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Acceleration of highest energy cosmic rays
Maxim Lyutikov - Purdue University
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Fun with dark energy
Andreas Albrecht - University of California, Davis
The discovery of cosmic acceleration has generated tremendous excitement among researchers in fundamental physics and cosmology. Most experts agree that nothing short of a revolution will be required to fully integrate the observed cosmic acceleration (which many attribute to a mysterious "dark… -
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Why did the universe start from a low entropy state
Laura Mersini-Houghton - University of North Carolina at Chapel Hill
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Confining the electroweak model to a brane
From the Quantum Field Theory point of view, matter and gauge fields are generally expected to be localised around branes (topological defects) occurring in extra dimensions. I will discuss a simple scenario where, by starting with a five dimensional SU(3) gauge theory, we end up with several 4-D… -
Cosmic superstrings: observable relics of brane inflation
Mark Wyman - PDT Partners LLC
Cosmic strings are a generic by-product of string theory models of the inflationary epoch. These new cosmic "superstrings," as they are called, are distinct from the grand unified strings once thought to generate large scale structure. I will discuss what limits the WMAP and SDSS data have already… -
Generating scale-invaraint power spectrum in string gas cosmology
Ali Nayeri - Chapman University
We study the generation of cosmological perturbations during the Hagedorn phase of string gas cosmology. Using tools of string thermodynamics we provide indications that it may be possible to obtain a nearly scale-invariant spectrum of cosmological fluctuations on scales which are of cosmological… -
Gravity and cosmology of the dilaton at "strong coupling"
Federico Piazza - Aix-Marseille University
A definite prediction of string theory is the existence of a scalar field, the dilaton. The presence of the dilaton generally leads to strong violations of the equivalence principle and thus describe a kind of gravitational force radically different from what we experience. String loop corrections… -
Perturbations in higher dimensions at the example of String Gas Cosmology
Thorsten Battefeld - Brown University
The theory of cosmological perturbations provides a bridge between theoretical models of the early universe (often motivated by string theory) and astrophysical observation, e.g of the CMBR. Since extra dimensions are pivotal to string theory, the known lore of perturbation theory needs to be… -
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Acceleration of highest energy cosmic rays
Maxim Lyutikov - Purdue University
Highest energy cosmic rays reach {\it macroscopic} energies $> 10^{20}$ eV ($\sim 10$ joules; corresponding linear momentum in one proton is similar to a slapshot hockey puck's). Such protons can either be accelerated by nearby astrophysical sources or be by-products of decay of unknown superheavy…