Journal of the Korean Physical Society

Korean Physical Society (한국물리학회)
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A Study on the Optimization of Finite Volume Effects of BK in Lattice QCD by Using the CUDA

  • Kim, Jangho (National Institute of Supercomputing and Networking, Korea Institute of Science and Technology Information) ;
  • Cho, Kihyeon (National Institute of Supercomputing and Networking, Korea Institute of Science and Technology Information)
  • Received : 2015.06.08
  • Accepted : 2015.06.15
  • Published : 2015.07.31
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Abstract

Lattice quantum chromodynamics (QCD) is the non-perturbative implementation of field theory to solve the QCD theory of quarks and gluons by using the Feynman path integral approach. We calculate the kaon CP (charge-parity) violation parameter BK generally arising in theories of physics beyond the Standard Model. Because lattice simulations are performed on finite volume lattices, the finite volume effects must be considered to exactly estimate the systematic error. The computational cost of numerical simulations may increase dramatically as the lattice spacing is decreased. Therefore, lattice QCD calculations must be optimized to account for the finite volume effects. The methodology used in this study was to develop an algorithm to parallelize the code by using a graphic processing unit (GPU) and to optimize the code to achieve as close to the theoretical peak performance as possible. The results revealed that the calculation speed of the newly-developed algorithm is significantly improved compared with that of the current algorithm for the finite volume effects.

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References

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