Lattice study of thermodynamic properties of dense 
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Astrakhantsev, Nikita; Брагута, В. В.; Ilgenfritz, Ernst-Michael; Kotov, A. Yu.; Николаев, А. А.

doi:10.1103/physrevd.102.074507

Cited by 30 publications

(19 citation statements)

References 50 publications

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“…Studies of two-color matter have been performed by several groups [34,[56][57][58][59][60][61][62][63][64]. teal In cold matter, these studies have confirmed that baryonic matter forms at an onset µ o = m π /2, whereupon diquarks start populating the vacuum.…”

Section: Baryon Densitymentioning

confidence: 94%

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Topological Aspects of Dense Matter: Lattice Studies

Lombardo¹

2021

Universe

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Topological fluctuations change their nature in the different phases of strong interactions, and the interrelation of topology, chiral symmetry and confinement at high temperature has been investigated in many lattice studies. This review is devoted to the much less explored subject of topology in dense matter. After a short overview of the status at zero density, which will serve as a baseline for the discussion, we will present lattice results for baryon rich matter, which, due to technical difficulties, has been mostly studied in two-color QCD, and for matter with isospin and chiral imbalances. In some cases, a coherent pattern emerges, and in particular the topological susceptibility seems suppressed at high temperature for baryon and isospin rich matter. However, at low temperatures the topological aspects of dense matter remain not completely clear and call for further studies.

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Section: Baryon Densitymentioning

confidence: 94%

“…In Ref. [33] as well as in lattice studies [34][35][36][37][38][39][40], the authors consider an idealization with µ I = 0, µ B = 0. Such a system is unstable under weak interactions which do not conserve isospin.…”

Section: Symmetries Of Qcd and Topologymentioning

confidence: 99%

Topological Aspects of Dense Matter: Lattice Studies

Lombardo¹

2021

Universe

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“…Another hint may be obtained from studies in two-color QCD; for this system, lattice MonteCarlo simulations are doable [88][89][90]. There have been seminal works on the phase diagram, EoS, and order parameters.…”

Section: For 5n 0 N B 40nmentioning

confidence: 99%

QCD equations of state and speed of sound in neutron stars

Kojo

2021

AAPPS Bull.

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Neutron stars are cosmic laboratories to study dense matter in quantum chromodynamics (QCD). The observable mass-radius relations of neutron stars are determined by QCD equations of state and can reflect the properties of QCD phase transitions. In the last decade, there have been historical discoveries in neutron stars; the discoveries of two-solar mass neutron stars and neutron star merger events, which have imposed tight constraints on equations of state. While a number of equations of state are constructed to satisfy these constraints, a theoretical challenge is how to reconcile those constructions with the microphysics expected from the hadron physics and in-medium calculations. In this short article, we briefly go over recent observations and discuss their implications for dense QCD matter, referring to QCD constraints in the low- and high-density limits, QCD-like theories, and lattice QCD results for baryon-baryon interactions.

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“…The actual results are displayed in Figure for the ratio of shear viscosity to entropy density η / s as a function of the scaled temperature T / T c for μ B = 0 in comparison to those from lattice QCD (Astrakhantsev et al ). The solid green line ( η Kubo / s ) shows the result from the original DQPM in the Kubo formalism, while the dashed green line

(η_{2 γ}^{normalRTA} / s)

shows the same result in the RTA (Equation (8)) by replacing Γ i by 2 γ i .…”

Section: Transport Properties Of the Partonic Systemmentioning

confidence: 99%

“…The solid red line

(η_{Γ^{on}}^{normalRTA} / s)

results from Equation (8) using the interaction rate Γ on calculated by the microscopic differential cross sections in the on‐shell limit. The dashed gray line demonstrates the Kovtun–Son–Starinets bound (Kovtun et al ) ( η / s ) KSS = 1/(4 π ), and the symbols show lQCD data for pure SU(3) gauge theory taken from Astrakhantsev et al () (pentagons)…”

Section: Transport Properties Of the Partonic Systemmentioning

confidence: 99%

Exploring the partonic phase at finite chemical potential within an extended off‐shell transport approach

et al. 2019

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We extend the parton-hadron-string dynamics (PHSD) transport approach in the partonic sector by explicitly calculating the total and differential partonic scattering cross sections as a function of temperature T and baryon chemical potential μ B on the basis of the effective propagators and couplings from the dynamical quasiparticle model (DQPM) that is matched to reproduce the equation of state of the partonic system above the deconfinement temperature T c from lattice quantum chromodynamics (QCD). We calculate the collisional widths for the partonic degrees of freedom at finite T and μ B in the time-like sector and conclude that the quasiparticle limit holds sufficiently well. Furthermore, the ratio of shear viscosity over entropy density s, that is, /s, is evaluated using the collisional widths and compared to lattice QCD(lQCD) calculations for μ B = 0 as well. We find that the ratio /s does not differ very much from that calculated within the original DQPM on the basis of the Kubo formalism. Furthermore, there is only a very modest change of /s with the baryon chemical μ B as a function of the scaled temperature T/T c (μ B ). This also holds for a variety of hadronic observables from central A + A collisions in the energy range 5 GeV ≤ √ s NN ≤ 200 GeV when implementing the differential cross sections into the PHSD approach. Accordingly, it will be difficult to extract finite μ B signals from the partonic dynamics based on "bulk" observables. K E Y W O R D Sheavy ions, quark-gluon plasma, transport models

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Lattice study of thermodynamic properties of dense QC2D

Cited by 30 publications

References 50 publications

Topological Aspects of Dense Matter: Lattice Studies

Topological Aspects of Dense Matter: Lattice Studies

QCD equations of state and speed of sound in neutron stars

Exploring the partonic phase at finite chemical potential within an extended off‐shell transport approach

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