Lattice Image

The RIKEN BNL Research Center’s QCDSP super-computer (12,288 nodes, .6 Teraflops) is used for a variety of Quantum Chromodynamics (QCD) calculations, typically in four dimensions (3 for space, one for time).

Shown Below are four three-dimensional slices of the topological charge density of a lattice QCD gauge configuration with red indicating high values of the topological charge.

By adding a fifth dimension, one can simulate the chirality (handedness) of fermions. Shown below are visualizations of the wave function of such domain-wall fermions averaged over the fifth dimension for a given time value. The image at the left represents left-handed chirality, at the right, right-handed chirality. The colorbar indicates the values of the wave function on a logarithmic scale.

Last Modified: February 1, 2008

One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE’s Office of Science by Brookhaven Science Associates, a limited-liability company founded by Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit, applied science and technology organization.

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