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Transport in strongly coupled quark matter
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Motivated by the possible presence of deconfined quark matter in neutron stars and their mergers and the important role of transport phenomena in these systems, we perform the first-ever systematic study of different viscosities and conductivities of dense quark matter using the gauge/gravity duality. Utilizing the V-QCD model, we arrive at results that are in qualitative disagreement with the predictions of perturbation theory, which highlights the differing transport properties of the system at weak and strong coupling and calls for caution in the use of the perturbative results in neutron-star applications.
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Cited by 2 Pith papers
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Fermi-liquid view of viscosity in cold and dense nucleon matter
In a quasiparticle Fermi liquid with medium-dependent mass, imposing Landau matching makes the bulk viscosity manifestly non-negative and parametrically smaller than shear viscosity at low temperature, ζ/η ∝ (T/μ*)⁴.
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Locating the QCD critical point with neutron-star observations
Bayesian analysis of a hybrid holographic EOS with neutron-star constraints locates the QCD critical endpoint at μ≈626 MeV and T≈119 MeV and predicts a strong first-order deconfinement transition at zero temperature.
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