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Shear viscosity in weakly coupled ${\cal N} {=} 4$ Super Yang-Mills theory compared to QCD

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arxiv hep-ph/0608062 v2 pith:EIQCUKFA submitted 2006-08-04 hep-ph hep-thnucl-th

classification hep-phhep-thnucl-th
keywords viscositycoupledresultsheartheorytimesweaklyyang-mills
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We compute the shear viscosity of weakly coupled N=4 supersymmetric Yang-Mills (SYM) theory. Our result for [eta/s], the viscosity to entropy-density ratio, is many times smaller than the corresponding weak-coupling result in QCD. This suggests that [eta/s] of QCD near the transition point is several times larger than the viscosity bound, [eta/s] >= 1/4 pi.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Transition from weak to strong coupling in thermal gauge theories: Lessons from ${\cal N}=4$ SYM Theory

    hep-th 2025-07 conditional novelty 4.0 of 10

    Padé interpolation between NLO weak- and strong-coupling results places the thermal N=4 SYM transition region at 't Hooft coupling λ roughly between 3 and 14.

  2. What is the Quark-Gluon Plasma made of?

    nucl-th 2025-06 accept novelty 2.0 of 10

    The quark-gluon plasma is best described as a strongly coupled liquid of massive, very short-lived quark and gluon quasiparticles, with sound (phonon) modes becoming the most well-defined collective excitation at low momenta.

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