Critical point in the phase diagram of primordial quark-gluon matter from black hole physics
Critical point in the phase diagram of primordial quark-gluon matter from black hole physics
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DOI：
10.1103/physrevd.96.096026
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发表时间：
2017-06
影响因子：
5
通讯作者：
R. Critelli;J. Noronha;J. Noronha-Hostler;I. Portillo;C. Ratti;U. RomuloRougemontSaoPaulo;U. Rutgers-U.-Ru
中科院分区：
文献类型：
--
作者：
R. Critelli;J. Noronha;J. Noronha-Hostler;I. Portillo;C. Ratti;U. RomuloRougemontSaoPaulo;U. Rutgers-U.-Ru
强相互作用物质在高温下经历交叉相变，在零净重子密度下发生交叉相变。强相互作用理论中的一个基本问题是，当一个热密的夸克和胶子系统掺入更多的夸克而不是反夸克时，是否会出现临界现象，因为在反夸克中，净重子数的涨落是不同的。最近的晶格QCD工作表明，这样的临界点只可能出现在理论的重子致密区，这与第一原理计算的描述不符。在这里，我们使用全息规范/引力对应将稠密夸克-胶子液体中重子电荷的涨落映射到一个涉及全息黑洞电荷涨落的数值易处理的引力问题上。这种方法定量地再现了重子起伏的最低阶矩的从头计算结果，并预测了高阶重子的磁化率和临界点的位置，这被发现是在重离子碰撞实验的范围内。
Strongly interacting matter undergoes a crossover phase transition at high temperatures $T\ensuremath{\sim}{10}^{12}\text{ }\text{ }\mathrm{K}$ and zero net-baryon density. A fundamental question in the theory of strong interactions, QCD, is whether a hot and dense system of quarks and gluons displays critical phenomena when doped with more quarks than antiquarks, where net-baryon number fluctuations diverge. Recent lattice QCD work indicates that such a critical point can only occur in the baryon dense regime of the theory, which defies a description from first principles calculations. Here we use the holographic gauge/gravity correspondence to map the fluctuations of baryon charge in the dense quark-gluon liquid onto a numerically tractable gravitational problem involving the charge fluctuations of holographic black holes. This approach quantitatively reproduces ab initio results for the lowest order moments of the baryon fluctuations and makes predictions for the higher-order baryon susceptibilities and also for the location of the critical point, which is found to be within the reach of heavy-ion collision experiments.