Past Events

High Energy Theory Seminar: "Pulling the Holographic Boundary into the Bulk"
October 1, 2018  2:00 pm  3:00 pm
David Rittenhouse Laboratory, 2N36
Yasunori Nomura, University of California Berkeley

Special High Energy Theory Seminar: "Primordial black holes as dark matter"
September 28, 2018  2:00 pm  3:00 pm
David Rittenhouse Laboratory, 4N12
Alex Kusenko, UCLA
I will discuss new and rather generic scenarios for production of black holes in the early universe. In some mass range, such black holes can account for all dark matter. Primordial black holes can also contribute to synthesis of heavy elements by disrupting neutron stars.

High Energy Theory Seminar: "Complementarity from Identity"
September 17, 2018  2:00 pm  3:00 pm
David Rittenhouse Laboratory, 2N36
Sergei Dubovsky, New York University

High Energy Theory Seminar: "Analytic IRresummation for the BAO peak"
September 10, 2018  2:00 pm  3:00 pm
David Rittenhouse Laboratory, 2N36
Matthew Lewandowsky, Institut de Physique Théorique (IPhT)
We develop an analytic method for implementing the IRresummation of 1404.5954, which allows one to correctly and consistently describe the imprint of baryon acoustic oscillations (BAO) on statistical observables in largescale structure. We show that the final IRresummed correlation function can be computed analytically without relying on numerical integration, thus allowing for an efficient and accurate use of these predictions on real data in cosmological parameter fitting.

High Energy Theory Seminar: "Interfaces and Topological Entanglement in Abelian ChernSimons Theory"
September 6, 2018  2:00 pm  3:00 pm
David Rittenhouse Laboratory, 4N12
Jackson Fliss, University of Illinois, Urbana Champaign
Starting from the condensed matter context, we consider the ground state entanglement across (possibly distinct) topological phases separated by a gapped interface. I will explain how addressing this from the effective gauge theory illuminates some generic features of entanglement entropy in systems with gauge invariance. In particular, we will explicitly implement the "extended Hilbert space" prescription directly in the continuum as well as highlight the unique role of the Ishibashi state in ChernSimons entanglement. Time permitting, I will discuss exten

High Energy Theory Seminar: (Stochastic Particle Production in the Early Universe)
April 23, 2018  2:00 pm
David Rittenhouse Laboratory, 2N36
Mustafa Amin (Rice University)
I will show some intriguing hints of universality in the occupation number of spectator/daughter fields that experience repeated stochastic particle production during inflation and reheating. The calculations are aided by a remarkable mathematical mapping between stochastic particle particle production in cosmology and current conduciton in disordered wires. Time permitting, I will discuss potential implications of the results for density perturbations from the early universe.

High Energy Theory Seminar: (TBA)
April 16, 2018  2:00 pm
David Rittenhouse Laboratory, 2N36
Walter Goldberger (Yale)

*Special* HET Seminar: "Bulk Entanglement Gravity"
April 11, 2018  1:00 pm
David Rittenhouse Laboratory, 4N12
Sean Carroll (Caltech)
Nature is quantum, but we human beings tend to think in terms of classical variables. I consider the emergence of spacetime and gravitation from a truly quantumfirst perspective, in which our best description of the world is as a state vector evolving in Hilbert space.

HET & HEE Joint Seminar: (TBA)
April 10, 2018  1:30 pm
David Rittenhouse Laboratory, 4N12
Michael RamseyMusolf (UMass Amherst)

HET & HEE Joint Seminar: "Cosmological Bounces and Wormholes from Vorticity"
March 27, 2018  1:30 pm
David Rittenhouse Laboratory, 4N12
David Kaplan (John Hopkins University)