2007

Lattice calculation of the QGP viscosities - Present results and next project -

Nakamura, Sunao Sakai Atsushi

Understand

The shear and bulk viscosities of gluon plasma are calculated by accumulating a large amount of data for the Matsubara Green function ($G_{\beta}(t_m)$) on isotropic $24^3 \times 8$ and $16^3 \times 8$ lattices.

  • In the case of Iwasaki's improved action, the calculations of $G_{\beta}(t_m)$ are carried out on roughly 6 million configurations, while for the standard action the calculations are done on more than 16 million configurations.
  • The shear viscosities increase roughly with $T^3$, and $\eta/s$ ratios are close to the KSS lower bound in the region where $1<T/T_c<25$.
  • Using these data the bulk viscosities are also determined in the region where $T/T_c < 2$.

Built on

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Similar

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Then

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    Later among the works it cites.

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    Later among the works it cites.

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