arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1607.04832hep-thhep-phnucl-th
收藏

扭曲全息核物质的相位

Phases of kinky holographic nuclear matter

Matthew Elliot-Ripley, Paul Sutcliffe, Marija Zamaklar

备注：
18 pages, 5 figures
发表信息：
JHEP 1610, 88 (2016)
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

在五维Sakai-Sugimoto模型下研究了零温有限重子数密度下的全息QCD。我们引入了一个新的近似模型，通过假设空间均匀性得到一个有效的扭结理论在全息方向上的孤子重子的涂抹晶体。扭结理论正确地再现了轻束缚核物质的一级相变。随着密度的进一步增加，扭结分裂成一对半扭结成分，提供了一个具体的实现之前建议的双离子盐相，其中体孤子分裂成高密度的成分。扭结模型还描述了重子爆米花现象，即一阶相变在全息方向上产生额外的孤子层。我们发现，这种爆米花过渡发生在密度低于dyonic盐相，使后者积极不利。然而，扭结模型预测只有一个弹出，而不是由以前的近似建议的弹出序列。在扭结模型中，由一次爆轰产生的两层形成了一个孤子袋的表面，随着重子化学势的增加，孤子袋的尺寸也会增加。袋的内部充满阿贝尔电势，且瞬子电荷密度位于袋的表面上。孤子袋可以提供夸克相的全息描述。

英文摘要：

Holographic QCD at finite baryon number density and zero temperature is studied within the five-dimensional Sakai-Sugimoto model. We introduce a new approximation that models a smeared crystal of solitonic baryons by assuming spatial homogeneity to obtain an effective kink theory in the holographic direction. The kink theory correctly reproduces a first order phase transition to lightly bound nuclear matter. As the density is further increased the kink splits into a pair of half-kink constituents, providing a concrete realization of the previously suggested dyonic salt phase, where the bulk soliton splits into constituents at high density. The kink model also captures the phenomenon of baryonic popcorn, in which a first order phase transition generates an additional soliton layer in the holographic direction. We find that this popcorn transition takes place at a density below the dyonic salt phase, making the latter energetically unfavourable. However, the kink model predicts only one pop, rather than the sequence of pops suggested by previous approximations. In the kink model the two layers produced by the single pop form the surface of a soliton bag that increases in size as the baryon chemical potential is increased. The interior of the bag is filled with abelian electric potential and the instanton charge density is localized on the surface of the bag. The soliton bag may provide a holographic description of a quarkyonic phase.

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。

↑