Theoretical Physics Group, Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom.
Phys Rev Lett. 2011 Dec 9;107(24):241601. doi: 10.1103/PhysRevLett.107.241601. Epub 2011 Dec 6.
We carry out the first holographic calculation of a fermionic response function for a strongly coupled d=3 system with an explicit D=10 or D=11 supergravity dual. By considering the supersymmetry current, we obtain a universal result applicable to all d=3 N=2 SCFTs with such duals. Surprisingly, the spectral function does not exhibit a Fermi surface, despite the fact that the system is at finite charge density. We show that it has a phonino pole and at low frequencies there is a depletion of spectral weight with a power-law scaling which is governed by a locally quantum critical point.
我们对具有显式 D=10 或 D=11 超引力对偶的强耦合 d=3 系统中的费米子响应函数进行了首次全息计算。通过考虑超对称电流，我们得到了一个适用于所有具有这种对偶的 d=3 N=2 SCFT 的通用结果。令人惊讶的是，尽管系统处于有限电荷密度下，但光谱函数并没有表现出费米面。我们表明，它具有声子极点，并且在低频下，光谱权重会出现幂律衰减，这是由局部量子临界点控制的。
