Jul 22 – 28, 2018
Kellogg Hotel and Conference Center
EST timezone

Topological Susceptibility to High Temperatures via Reweighting

Jul 24, 2018, 3:00 PM
Centennial (Kellogg Hotel and Conference Center)


Kellogg Hotel and Conference Center

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


Mr P. Thomas Jahn (TU Darmstadt)


At high temperatures, the topological susceptibility of QCD becomes relevant for the properties of axion dark matter. However, the strong suppression of non-zero topological sectors causes ordinary sampling techniques to fail, since fluctuations of the topological charge can only be measured reliably if enough tunneling events between sectors occur. We present a new method to circumvent this problem based on a combination of gradient flow and reweighting techniques. Moreover, we quote continuum extrapolated results for the topological susceptibility in the quenched approximation at $2.5~T_\mathrm c$ and $4.1~T_\mathrm c$.

Primary author

Mr P. Thomas Jahn (TU Darmstadt)


Dr Daniel Robaina (TU Darmstadt) Prof. Guy D. Moore (TU Darmstadt)

Presentation materials