arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0711.3763hep-th
收藏

夸克-胶子等离子体和锥状面上的D6-branes

The quark-gluon plasma and D6-branes on the conifold

Johannes Schmude

摘要:

本文研究了利用变形锥中包裹三圈的D 6-膜构造夸克-胶子等离子体的超引力背景对偶的可能性。这个设置的UV-完成是由G2完整流形上的M-理论给出的。对于考虑的度量类,我们发现,只有非极值D-膜解决方案的奇异锥的极限与奇异性被解决的D-膜地平线。系统的热力学性质显示出一些令人困惑的特征,如负比热在熵的一个不寻常的行为。在使用这种全息对偶研究的等离子体的性质是夸克-反夸克势,剪切粘度和部分子能量损失。虽然人们发现预期的行为的潜力和粘度-解除禁闭和普遍的剪切粘度熵比-射流淬火参数和计算的阻力导致我们的结论是,没有部分子的能量损失的双重等离子体。我们的研究结果表明,构造的背景是不是一个现实的QGP对偶,但我们认为,这应该改善后,列入的三种形式的规范位在11维背景。

英文摘要:

We investigate the possibility of constructing a supergravity background dual to the quark-gluon plasma using D6-branes wrapping a three-cycle in the deformed conifold. The UV-completion of this setup is given by M-theory on a G2 holonomy manifold. For the class of metrics considered we find that there are only non-extremal D-brane solutions in the limit of the singular conifold with the singularity being resolved by the D-brane horizon. The thermodynamic properties of the system show some puzzling features, such as negative specific heat at an unusual behavior of the entropy. Among the properties of the plasma studied using this holographic dual are the quark-antiquark potential, the shear viscosity and parton energy loss. While one finds the expected behavior for the potential and the viscosity -- deconfinement and the universal shear-viscosity to entropy ratio -- both the jet quenching parameter and the calculation of the drag force lead us to the conclusion that there is no parton energy loss in the dual plasma. Our results indicate that the background constructed is not dual to a realistic QGP, yet we argue that this should improve upon inclusion of the three-form gauge potential in the eleven-dimensional background.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑