Facets of the QCD Phase-Diagram

Koch, Volker; Bzdak, Adam; Liao, Jinfeng

doi:10.1051/epjconf/20111302001

Cited by 3 publications

(3 citation statements)

References 42 publications

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“…The fluidity of the system has been defined in Ref. [13,21] with the introduction of a new quantity which depends on the intrinsic properties of the fluid and enables one to compare fluids of wide varieties such as non-relativistic fluid like water and relativistic, extremely dense and hot fluid like QGP. For example, the temperature of water and QGP differ by a factor ∼ O(10 10 ).…”

Section: B Measure Of Fluiditymentioning

confidence: 99%

Effects of causality on the fluidity and viscous horizon of quark-gluon plasma

Rahaman

Alam

2018

Phys. Rev. C

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The second order Israel-Stewart-Müller relativistic hydrodynamics has been applied to study the effects of causality on the acoustic oscillation in relativistic fluid. Causal dispersion relations have been derived with non-vanishing shear viscosity, bulk viscosity and thermal conductivity at nonzero temperature and baryonic chemical potential. These relations have been used to investigate the fluidity of Quark Gluon Plasma (QGP) at finite temperature (T ). Results of the first order dissipative hydrodynamics have been obtained as limiting case of the second order theory. The effects of the causality on the fluidity near the transition point and on viscous horizon are found to be significant. We observe that the inclusion of causality increases the value of fluidity measure of QGP near Tc and hence makes the flow strenuous. It has also been shown that the inclusion of large magnetic field in the causal hydrodynamics alters the fluidity of QGP.

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Section: B Measure Of Fluiditymentioning

confidence: 99%

Effects of causality on the fluidity and viscous horizon of quark-gluon plasma

Rahaman

Alam

2018

Phys. Rev. C

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“…However, while it is true that, in many contexts, the viscosity only appears through η s , in many other physical applications one is also interested in (some measure of) the viscosity itself -and this includes discussions of the QGP, see for example [11,12]. Whether the actual viscosity of the QGP is "small" is a somewhat delicate question.…”

Section: Two Measures Of the Qgp Viscositymentioning

confidence: 99%

“…simply by B. 12 The Lorentzian version of the argument runs as follows [52]: the Lorentzian version of S E is, up to factors involving the brane tension, equal to the action of a BPS brane in the Lorentzian black hole geometry [59]. If this action becomes negative at sufficiently large r, this means that it is smaller than its value at the event horizon.…”

Section: Holographic Model Of ν(Qgp): Specificsmentioning

confidence: 99%

Holography of the QGP Reynolds number

McInnes

2017

Nuclear Physics B

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The viscosity of the Quark-Gluon Plasma (QGP) is usually described holographically by the entropy-normalized dynamic viscosity η/s. However, other measures of viscosity, such as the kinematic viscosity ν and the Reynolds number Re, are often useful, and they too should be investigated from a holographic point of view. We show that a simple model of this kind puts an upper bound on Re for nearly central collisions at a given temperature; this upper bound is in very good agreement with the observational lower bound (from the RHIC facility). Furthermore, in a holographic approach using only Einstein gravity, η/s does not respond to variations of other physical parameters, while ν and Re can do so. In particular, it is known that the magnetic fields arising in peripheral heavy-ion collisions vary strongly with the impact parameter b, and we find that the holographic model predicts that ν and Re can also be expected to vary substantially with the magnetic field and therefore with b.

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