Event Siddharth A. Parameswaran 

Nodal semimetals: exploring “relativistic” fermions and quantum anomalies in solids

Solid-state systems, while seemingly built up of conventional components — namely, electrons and ions coupled by the Coulomb interaction — can nevertheless sometimes exhibit a variety of phenomena more familiar to particle physicists than those working on condensed-matter systems. Possibly the most striking example of this is the emergence of “relativistic” Weyl fermions in solids— a phenomenon predicted as early as the 1930s, but only recently probed by experiments in real materials. I’ll discuss how these solid-state systems could provide “table top” realizations of Weyl fermions and illuminate subtle features of anomalies in quantum field theories. If there is time, I’ll also discuss how strongly-interacting electronic systems may be described at low energies by quantum gauge theories similar to the familiar Maxwell electrodynamics, but in the strongly-coupled regime.


About The Speaker


Siddharth Parameswaran graduated from the University of Rochester, USA with a BS in Physics and a BA in Mathematics in 2006. He then moved to Princeton University where he received a PhD in theoretical physics in 2011. He spent three years  (2011-14) at the University of California, Berkeley, as a Simons Postdoctoral Fellow in physics, before establishing an independent research group at the University of California, Irvine, where he was an Assistant Professor from 2014-2017. During this time, he received  a US National Science Foundation CAREER award. Sid was appointed as an Associate Professor in Quantum Condensed Matter Theory and a Tutorial Fellow in Physics at Hertford College in 2017, and received a European Research Council Starting Grant in 2018 to support his research into topological phases of quantum matter. He has broad interests in condensed matter physics, with a particular focus on two areas: the interplay of topology and symmetry in strongly-correlated materials, and the far-from-equilibrium dynamics of many-particle quantum systems.