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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

The QCD Anderson transition with Nf=2+1+1 twisted mass Wilson quarks

Jul 27, 2018, 3:20 PM
20m
Centennial (Kellogg Hotel and Conference Center)

Centennial

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Nonzero Temperature and Density Nonzero Temperature and Density

Speaker

Mr Lukas Holicki (JLU Giessen)

Description

Chiral Random Matrix Theory has proven to describe the spectral prop- erties of low temperature QCD very well. However, at temperatures above the chiral symmetry restoring transition it can not provide a global descrip- tion. The level-spacing distribution in lower part of the spectrum of the Dirac operator is Poisson-like. The eigenmodes are localized in space-time and separated from the rest of the spectrum by a so-called mobility edge. In analogy to Anderson localization in condensed-matter systems with random disorder this has been called the QCD-Anderson transition. Here, we study the localization features of the low-lying eigenmodes of the massless overlap operator on Nf=2+1+1 twisted mass Wilson sea quarks and present results concerning the temperature dependence of the mobility edge and the mechanism of the quark-mode localization. We have used various methods to fix the spectral position of the delocalization transi- tion and verify that the mobility edge extrapolates to zero at a temperature within the chiral transition region.

Primary author

Mr Lukas Holicki (JLU Giessen)

Co-authors

Prof. Ernst-Michael Ilgenfritz (JINR Dubna) Prof. Lorenz von Smekal (JLU Giessen)

Presentation Materials