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Event Date Summary
Sarah Shandera (Penn State) Tue. May 9th, 2017
11:00 am-12:00 pm

Cosmological open quantum systems
Our current understanding of the universe relies on an inherently quantum origin for the rich, inhomogeneous structure we see today. Inflation (or any of the alternative proposals for the primordial era) easily generates a universe exponentially larger than what we can observe. …Read more.

Ema Dimastrogiovanni (CWRU) Tue. April 25th, 2017
11:00 am-12:00 pm

Primordial gravitational waves: Imprints and search
Discussed will be some interesting scenarios for the generation of gravitational waves from inflation and the characteristic imprints we can search with upcoming cosmological observations. …Read more.

Matthew Johnson (Perimeter Institute) Tue. April 18th, 2017
11:00 am-12:00 pm

Mapping Ultra Large Scale Structure
Anomalies in the CMB on large angular scales could find an explanation in terms of pre-inflationary physics or intrinsic statistical anisotropies. However, due to cosmic variance it is difficult to conclusively test many of these ideas using the primary cosmic microwave background (CMB) alone. …Read more.

David Chuss (Villanova) Tue. April 11th, 2017
11:00 am-12:00 pm

The Cosmology Large Angular Scale Surveyor (CLASS)
Precise observations of the cosmic microwave background have played a leading role in the development of the LCDM model of cosmology, which has been successful in describing the universe’s energy content and evolution using a mere six parameters. …Read more.

Donghui Jeong (Penn State) Tue. April 4th, 2017
11:00 am-12:00 pm

Non-linearities in large-scale structure: Induced gravitational waves, non-linear galaxy bias
I will present my recent work on non-linearities in large-scale structures of the Universe. For the first part, I will discuss the gauge dependence of the scalar-induced tensor perturbations and its implication on searching the primordial gravitational wave signature from the large-scale structure. …Read more.

Ben Monreal (CWRU) Tue. March 28th, 2017
11:00 am-12:00 pm

Nuclei, neutrinos, and microwaves: searching for the neutrino mass in tritium decay
When Enrico Fermi published his theory of beta decay in 1934—what we now call the weak interaction—he suggested how experiments could measure the neutrino mass: by looking at the shape of the energy distribution of beta decay electrons.   …Read more.

Mauricio Bustamante (CCAPP, OSU) Tue. March 21st, 2017
11:00 am-12:00 pm

Prospecting for new physics with high-energy astrophysical neutrinos

High-energy astrophysical neutrinos, recently discovered by IceCube, are fertile ground to look for new physics.  Due to the high neutrino energies — tens of TeV to a few PeV — we can look for new physics at unexplored energies.  …Read more.

Robert Caldwell (Dartmouth) Tue. March 7th, 2017
11:00 am-12:00 pm

Cosmology with Flavor-Space Locked Fields
We present new models of cosmic acceleration built from a cosmological SU(2) field in a flavor-space locked configuration. We show that such fields are gravitationally birefringent, and absorb and re-emit gravitational waves through the phenomenon of gravitational wave — gauge field oscillations. …Read more.

Matthew Baumgart (Perimeter Institute) Tue. February 14th, 2017
11:00 am-12:00 pm

De Sitter Wavefunctionals and the Resummation of Time
The holographic RG of Anti-De Sitter gives a powerful clue about the underlying AdS/CFT correspondence. The question is whether similar hints can be found for the heretofore elusive holographic dual of De Sitter. …Read more.

Andrew Zentner (Pittsburgh) Tue. February 7th, 2017
11:00 am-12:00 pm

The Power-Law Galaxy Correlation Function
For nearly 40 years, the galaxy-galaxy correlation function has been used to characterize the distribution of galaxies on the sky. In addition, the galaxy correlation function has been recognized as very nearly power-law like despite the fact that it is measured over a wide range of scales. …Read more.

Kurt Hinterbichler (CWRU) Tue. January 31st, 2017
11:00 am-12:00 pm

Partially Massless Higher-Spin Gauge Theory
The higher spin theories of Vasiliev are gauge theories that contain towers of massless particles of all spins, and are thought to be UV complete quantum theories that include gravity, describing physics at energies much higher than the Planck scale. …Read more.

Lucile Savary (MIT) — Michelson Postdoctoral Prize Lecturer Tue. January 24th, 2017
11:00 am-12:00 pm

Quantum Spin Ice
Recent work has highlighted remarkable effects of classical thermal fluctuations in the dipolar spin ice compounds, such as “artificial magnetostatics.” In this talk, I will address the effects of terms which induce quantum dynamics in a range of models close to the classical spin ice point. …Read more.

Lucile Savary (MIT) — Michelson Postdoctoral Prize Lecturer Mon. January 23rd, 2017
4:15 pm-5:15 pm

A New Type of Quantum Criticality in the Pyrochlore Iridates
The search for truly quantum phases of matter is one of the center pieces of modern research in condensed matter physics. …Read more.

Claire Zukowski (Columbia U.) Tue. January 17th, 2017
11:00 am-12:00 pm

Emergent de Sitter Spaces from Entanglement Entropy
A theory of gravity can be holographically “emergent” from a field theory in one lower dimension. In most known cases, the gravitational theory lives in an asymptotically anti- de Sitter spacetime with very different properties from our own de Sitter universe. …Read more.

Page last modified: September 26, 2017