Entanglement and excitations in gauge/gravity duality

全息方法用于研究全息对偶理论中的现象，特别是凝聚态系统的模型，包括非平衡稳态、量子杂质和量子可压缩物质。研究的主要量是这些理论的纠缠熵和激发谱。规范/重力对偶性提供了一种计算工具，在传统技术失效的情况下，例如，人们可以研究这些系统的激励，远离水动力状态，从而允许对强耦合系统的行为有新的见解。

Holographic methods are used to investigate phenomena in theories with holographic duals, particularly models of condensed matter systems including non-equilibrium steady states, quantum impurities and quantum compressible matter. The primary quantities studied are the entanglement entropy and the spectrum of excitations of such theories. Gauge/gravity duality provides a tool for computation in regimes where more traditional techniques break down, for example one can study the excitations of these systems away from the hydrodynamic regime, thus allowing for new insights into the behavior of strongly coupled systems.