CLS 2+1 flavor simulations at physical light- and strange-quark masses

Abstract

We report recent efforts by CLS to generate an ensemble with physical light- and strange-quark masses in a lattice volume of 192x96^3 at $\beta =3.55$ corresponding to a lattice spacing of 0.064 fm. This ensemble is being generated as part of the CLS 2+1 flavor effort with improved Wilson fermions. Our simulations currently cover 5 lattice spacings ranging from 0.039 fm to 0.086 fm at various pion masses along chiral trajectories with either the sum of the quark masses kept fixed, or with the strange-quark mass at the physical value. The current status of simulations is briefly reviewed, including a short discussion of measured autocorrelation times and of the main features of the simulations. We then proceed to discuss the thermalization strategy employed for the generation of the physical quark-mass ensemble and present first results for some simple observables. Challenges encountered in the simulation are highlighted.

7 pages, 8 figures; Proceedings, 35th International Symposium on Lattice Field Theory (Lattice2017): Granada, Spain

References in corpus (5)

• Simulation of QCD with N_f=2+1 flavors of non-perturbatively improved Wilson fermions
• Local coherence and deflation of the low quark modes in lattice QCD
• Deflation acceleration of lattice QCD simulations
• Multi-hadron spectroscopy in a large physical volume
• Light-by-light forward scattering amplitudes in Lattice QCD

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