Department Calendar

Monday, January 22, 2018

Time Items
All day
 
2pm
"The strong CP problem and UV instantons"

"The strong CP problem and UV instantons"

Date: 
Mon, 01/22/2018 - 2:10pm
Location: 
Pupin Hall Theory Center, 8th Floor

Prateek Agrawal

Harvard Univesity

"The strong CP problem and UV instantons"

The absence of sizeable CP violation in the strong sector is a long standing puzzle. A class of solutions to this problem rely on a global U(1) symmetry that is anomalous with QCD. These solutions lead to robust low-energy predictions, for example a massless up quark or a light axion. I will present simple extensions to such solutions which can dramatically change these low-energy predictions. In our models, contributions from small instantons play a significant role in affecting the low-energy physics while preserving the solution to the strong CP problem.

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01/22/2018 - 2:10pm
 
4pm
"Unlocking the secrets of the fastest fluid in nature"

"Unlocking the secrets of the fastest fluid in nature"

Date: 
Mon, 01/22/2018 - 4:15pm
Location: 
428 Pupin Hall

Jorge Noronha

University of São Paulo

"Unlocking the secrets of the fastest fluid in nature"

Fluid dynamic behavior is observed in radically different systems, ranging from ordinary fluids (such as water) to their exotic counterparts formed in ultra-relativistic particle collisions and the strongly interacting matter formed in neutron star mergers. Yet, their description defies physicists and mathematicians, especially when the flow velocities involved are near the speed of light. 

This talk will present an introduction to the modern applications of fluid dynamics, focusing on the Quark-Gluon Plasma, the primordial liquid that existed microseconds after the Big Bang. First principles calculations that have challenged the very foundations of fluid dynamics, pushing it towards the far-from-equilibrium regime, will be discussed. A new type of universality is shown to emerge in systems far from equilibrium via non-equilibrium attractor solutions, first found in relativistic liquids. 

About the speaker

Jorge Noronha received his PhD in theoretical physics from Goethe University Frankfurt, Germany, in 2007.  Following his PhD, Jorge worked as a postdoctoral scientist at Columbia University from 2008-2011 before joining the faculty at the University of Sao Paulo, Brazil, where he is currently an Assistant Professor.  
 
Jorge research interests' include, Quantum chromodynamics, String theory and the holographic duality, Quark-gluon plasma, and Fluid dynamics and kinetic theory in curved spacetimes.  
 
 
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01/22/2018 - 4:15pm
 
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