Patrick Shaw '19 will speak about "Dark Energy in the Axiverse."
Abstract: The discovery that the Universe is accelerating in its expansion shook the field of physical cosmology to its core. Further, it is estimated that so-called dark energy, the mysterious mechanism driving accelerated expansion, constitutes over 68% of the energy content in the universe. Consequently, our poor understanding of the fundamental physics underlying dark energy represents one of the largest outstanding problems in contemporary cosmology.
One interesting avenue of investigation into this issue involves the so-called axiverse. Many beyond standard model theories of particle physics involve the introduction of a new axion particle. Furthermore, string theory provides scenarios where there could exist a large collection of axions existing at different mass scales. The scalar fields corresponding to these particles introduce new dynamics to the evolution of the Universe that can lead to periods of accelerated expansion. Using a GPU-enabled version of our GABE code, I was successful in producing a simulation of axiverse inflation with multiple eras of accelerated expansion.
This talk is part of the Physics Colloquium Series.
All talks begin promptly at 12:10 p.m. Lunch will be served from 11:50 a.m. to 12:10 p.m.
Friday, September 21, 2018 at 12:10pm to 1:00pm
Hayes Hall, 211/213
201 North College Road, Gambier, OH 43022