Interaction induced quasi-particle spectrum in holography

Abstract

Abstract It is often said that interactions destroy the particle nature of excitations. We report that, in holographic theory adding interaction term can create a new quasi particle spectrum, on the contrary. We show this by calculating the optical conductivity in a model with exact background solution and finding a new quasi-particle spectrum. Such new poles are consequence of some non-minimal interaction like Chern-Simon term. We also point out that the origin of the new peak in our example is the vortex formation by the anomalous magnetic moment induced by the interaction term.

Keywords

• Holography and condensed matter physics (AdS/CMT)
• AdS-CFT Corre- spondence
• Gauge-gravity correspondence