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Volume 281 - The 26th International Nuclear Physics Conference (INPC2016) - Hot and Dense Nuclear Matter – Friday 16
QCD Thermodynamics On The Lattice from The Gradient Flow
E. Itou,* S. Aoki
*corresponding author
Full text: pdf
Pre-published on: 2017 May 04
Published on: 2017 May 09
To obtain the precise values of the bulk quantities and transport coefficients in quark-gluon-plasma phase, we propose that a direct calculation of the renormalized energy-momentum tensor (EMT) on the lattice using the gradient flow.
From one-point function of EMT, authors in Ref.[1] obtained the interaction measure and thermal entropy. The results are consistent with the one obtained by the integral method.
Based on the success, we try to measure the two-point function of EMT, which is related to the transport coefficients.
Advantages of our method are (1) a clear signal because of the smearing effects of the gradient flow and (2) no need to calculate the wave function renormalization of EMT.
In addition, we give a short remark on a comparison of the numerical cost between the positive- and adjoint-flow methods for fermions, needed to obtain the EMT in the (2+1) flavor QCD.
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