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arXiv 0805.0076hep-th
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Hagedorn相变能从弦的矩阵模型得到解释吗?

Can the Hagedorn Phase Transition be explained from Matrix Model for Strings?

B. Sathiapalan, Nilanjan Sircar

摘要:

本文研究了两种经典背景下BFSS矩阵模型的配分函数,直到单圈水平。其中一个背景对应于一个缠绕在紧致方向上的膜,另一个背景对应于$D0$ -膜的局部簇。结果表明,这两种配置之间存在相变-但只有在存在的IR截止。低温相对应于弦(包裹膜)相,因此我们称之为哈格多恩相变。虽然红外截止的存在似乎只是微扰分析有效所必需的,但这种截止的物理必要性可以在双超重力方面看到。从熵的考虑出发,已经论证了即使在D 0-膜的极端构型中,从高阶导数$O(g_s)$修正到超引力,也必须发展出有限尺寸的视界。这样就可以证明超引力中也存在类似哈格多恩的跃迁。有趣的是,微扰分析还显示了第二个相变回到弦相。这也让人想起了格雷戈里-拉弗拉姆不稳定性。

英文摘要:

The partition function of BFSS matrix model is studied for two different classical backgrounds upto 1-loop level. One of the backgrounds correspond to a membrane wrapped around a compact direction and another to a localized cluster of $D0$-branes. It is shown there exist phase transitions between these two configurations - but only in presence of an IR cut-off. The low temperature phase corresponds to a string (wrapped membrane) phase and so we call this the Hagedorn phase transition. While the presence of an IR cut-off seemingly is only required for perturbative analysis to be valid, the physical necessity of such a cut-off can be seen in the dual supergravity side. It has been argued from entropy considerations that a finite size horizon must develop even in an extremal configuration of D0-branes, from higher derivative $O(g_s)$ corrections to supergravity. It can then be shown that the Hagedorn like transition exists in supergravity also. Interestingly the perturbative analysis also shows a second phase transition back to a string phase. This is also reminiscent of the Gregory-Laflamme instability.

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。

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