Events at Physics

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Events on Tuesday, October 11th, 2016

What Can Molecular Spectroscopy Tell Us About the Big Bang?
Time: 11:00 am
Place: 1315 Chemistry
Speaker: Eric A. Cornell, JILA| University of Colorado at Boulder | NIST
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Chaos & Complex Systems Seminar
Categorizing and visualizing basins of attraction
Time: 12:05 pm - 1:00 pm
Place: 4274 Chamberlin (refreshments will be served)
Speaker: Anda Xiong, UW Department of Physics
Abstract: With chaos research, the attention has been most often been given to topics like the chaotic attractor and the Lyapunov exponent, while less attention has been paid to the basin of attraction, yet the latter is essential for determining and calculating the multi-stability of a dynamical system. I will explain the concept of a basin of attraction and show a means for classifying basins into four different types and quantifying their size. I will show examples of attractor basins produced using a 3-D printer including the famous Lorenz system in an unusual regime where three attractors coexist.<br>
Host: Clint Sprott
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Theory Seminar (High Energy/Cosmology)
What can we learn from particle physics to study cosmological perturbation theory?
Time: 3:30 pm
Place: 5280 Chamberlin
Speaker: Min-Seok Seo, IBS, Korea
Abstract: Through the development of the effective field theory of inflation, we can interpret the cosmological perturbation theory as a quantum behavior of the Goldstone boson resulting from the spontaneous breaking of the time translation symmetry. Under this point of view, many wisdoms obtained from the particle physics have been applied to understand the inflationary cosmology. In this talk, we revisit such aspects of the cosmological perturbation theory in the multi-field context, providing more general framework.
Host: Gary Shiu
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