Photoemission with Chemical Potential from QCD Gravity Dual
Photoemission with Chemical Potential from QCD Gravity Dual
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QCD 重力双核的化学势光电发射
DOI：
10.1016/j.nuclphysb.2007.01.015
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
D. Sahakyan
中科院分区：
文献类型：
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作者：
A. Parnachev;D. Sahakyan
我们考虑一个D4-D8-D¯8膜结构，在足够小的能量下产生一个大的N QCD。利用该体系的重力对偶，研究了有限化学势和有限温度下的手性相变，并在相平面上找到了一条一阶相变线。我们计算了光谱函数和光子发射率。在化学势消失时，谱函数的轨迹是单调的，但随着化学势的增大，谱函数发展出一些有趣的特征。
We consider a D4–D8–D¯8 brane construction which gives rise to a large N QCD at sufficiently small energies. Using the gravity dual of this system, we study chiral phase transition at finite chemical potential and temperature and find a line of first order phase transitions in the phase plane. We compute the spectral function and the photon emission rate. The trace of the spectral function is monotonic at vanishing chemical potential, but develops some interesting features as the value of the chemical potential is increased.