报告题目：Chiral soliton lattice in quark matter under extreme conditions

主讲人：Tomáš Brauner教授

单位：挪威斯塔凡格大学

时间：5月31日17:00

ZOOMID：210-089-8623

密码：123456

摘要：The lightest hadrons observed in nature are pseudoscalar mesons: the pions. These can be viewed as quark-antiquark bound states and therefore have vanishing baryon number; they do not constitute matter in the usual sense. However, as proposed long ago by Skyrme, baryon number can emerge effectively as a topological charge, carried by topologically nontrivial pion field configurations. The formation of such solitons – the skyrmions – is associated with a characteristic energy scale, corresponding to the scale of the nucleon mass. In this talk, I will introduce a novel phase of quark matter where a topologically realized baryon number appears at low energies, provided a suitable external field is present. Indeed, I will show that in sufficiently strong magnetic fields, a one-dimensional soliton lattice carrying baryon number becomes the ground state of quantum chromodynamics. The basic theoretical description of this Chiral Soliton Lattice (CSL) phase is very well known, and relies on the mathematics of a simple pendulum. I will discuss to some extent the spectrum of fluctuations of the CSL state and the effect of these fluctuations on the phase diagram. In the last part of the talk, I will give an overview of related work on the realizations of the CSL phase in quark matter under a variety of external conditions.

简介：Tomáš Brauner is a professor of physics at Stavanger University, Norway and has been a postdoc at the Nuclear Physics Institute, The Academy of Sciences of the Czech Republic (2006-2011), at Frankfurt University, Germany (2007-2010), at Bielefeld University, Germany (2010-2013), at Helsinki University, Finland (2013-2014), at TU Wien, Austria (2014-2015). Brauner is an expert on Nambu-Goldstone bosons in quantum many-body systems, superfluids, quarkyonic phases of matter, the inverse Higgs effect and especially the chiral soliton lattice. Brauner has published 6 letters in Phys.Rev.Lett. (PRL) (127 citations) and over 50 paperss in JHEP, Phys.Rev.D, Phys.Rev.B, Phys.Lett.B, Nucl.Phys.B, Nucl.Phys.A, J.Phys.G, Annals Phys., Mod.Phys.Lett.A, Eur.Phys.J.C., Eur.Phys.J.A, Phys.Scripta, Symmetry with more than 1300 citations.