The QCD phase diagram in the limit of heavy quarks using complex Langevin dynamics

Gert Aarts, Felipe Attanasio, Benjamin Jäger, Dénes Sexty

Research output: Contribution to journalJournal articleResearchpeer-review


Complex Langevin simulations allow numerical studies of theories that exhibit a sign problem, such as QCD, and are thereby potentially suitable to determine the QCD phase diagram from first principles. Here we study QCD in the limit of heavy quarks for a wide range of temperatures and chemical potentials. Our results include an analysis of the adaptive gauge cooling technique, which prevents large excursions into the non-compact directions of the SL(3, ℂ) manifold. We find that such excursions may appear spontaneously and change the statistical distribution of physical observables, which leads to disagreement with known results. Results whose excursions are sufficiently small are used to map the boundary line between confined and deconfined quark phases.

Original languageEnglish
Article number87
JournalJournal of High Energy Physics
Issue number9
Publication statusPublished - Sept 2016
Externally publishedYes


  • Lattice QCD
  • Phase Diagram of QCD


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