Chiral Matter
from quarks to Dirac semimetals

December 5-8, 2016, RIKEN Okochi-Hall, Wako, Saitama, Japan

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Motivation and Backgrounds

Topology has been a key to unravel many universal phenomena that emerge from seemingly complex systems of condensed matter and gauge theories such as QCD. New phases of condensed matter that are built upon and protected by their topological properties (topological phases of matter) have had significant impacts in our theoretical understanding of possible novel emergent phenomena from topology, that are often rooted in deep connections and insights between mathematics and physics. In the last few years, an excitingly new form of topological phases of matter have been theoretically predicted and experimentally realized: Weyl semi-metals and Dirac semi-metals. These novel 3-dimensional topological matters are characterized by their quasi-particle excitations having “chirality”, that is, their (pseud spins are interlocked with the momentum, which is one of the fundamental features that one also finds in relativistic field theories of massless spinful fermions, such as QCD in deconfined, chiral limit in a high enough temperature. On the other hand, there has recently been significant progress in our understanding on topological transport phenomena in QCD originated in chirality of spinful fermions, often coined as “chiral anomalous hydrodynaics” that may lead to observable signatures of topological fluctuations of QCD in relativistic heavy-ion collision experiments. This tantalizing connection between the new topological phases of matter and relativistic field theories of chiral fermions gives an unprecedented opportunity to observe one of the fundamental aspects of QCD dynamics in table-top experiments. Conversely, the actively evolving field of chiral anomalous hydrodynamics has been guiding the topological characterization of semi-metals, and will continue providing new insights and perspectives not only in the theory of these novel Weyl/Dirac semi-metals, but also in the experiments and device applications of them. On a more formal theory side, there recently have been significant progresses in proving and classifying chiral anomalous hydrodynamics in a variety of theoretical tools, including second law of thermodynamics, AdS/CFT correspondence, and quantum field theory of chiral anomaly.
This workshop shall be a valuable, first time occasion to bring together the expert practitioners in all three communities of condensed matter, QCD, and quantum field theory (AdS/CFT correspondence), under the same theme of novel phenomena deeply rooted in topology. The workshop aims at providing the participants with a unique indispensable opportunity to share ideas and insights on the novel topological phenomena from three different angles, potentially leading to synergistic advancement of this fast evolving field of physics.

(Pre) Workshop Series

Related workshops have been organized by some of the present organizers and a lot of insightful discussions on chirality physics can be still found from the talk files available at the workshop webpages:
P- and CP-odd Effects in Hot and Dense Matter (2010)
P- and CP-odd Effects in Hot and Dense Matter (2012)


Dmitri E. Kharzeev (RIKEN BNL Research Center / Stony Brook U., Chair)
Kenji Fukushima (The University of Tokyo)
Akira Furusaki (RIKEN iTHES / CEMS)
Tetsuo Hatsuda (RIKEN iTHES / RIKEN Nishina Center)
Naoto Nagaosa (RIKEN CEMS / The University of Tokyo)
Ho-Ung Yee (RIKEN / U. of Illinois)

This symposium is supported by RIKEN RBRC, RIKEN Nishina Center, RIKEN iTHES and RIKEN CEMS.
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