DiNunno, Brandon S.Ihl, MatthiasJokela, NikoPedraza, Juan F.2020-04-162020-04-162014DiNunno, B.S., Ihl, M., Jokela, N. et al. Holographic zero sound at finite temperature in the Sakai-Sugimoto model. J. High Energ. Phys. 2014, 149 (2014). https://doi.org/10.1007/JHEP04(2014)1491029-8479http://hdl.handle.net/10347/21451In this paper, we study the fate of the holographic zero sound mode at finite temperature and non-zero baryon density in the deconfined phase of the Sakai-Sugimoto model of holographic QCD. We establish the existence of such a mode for a wide range of temperatures and investigate the dispersion relation, quasi-normal modes, and spectral functions of the collective excitations in four different regimes, namely, the collisionless quantum, collisionless thermal, and two distinct hydrodynamic regimes. For sufficiently high temperatures, the zero sound completely disappears, and the low energy physics is dominated by an emergent diffusive mode. We compare our findings to Landau-Fermi liquid theory and to other holographic modelseng© 2014 The Authors. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were madehttps://creativecommons.org/licenses/by/4.0Gauge-gravity correspondenceAdS-CFT correspondenceHolography and condensed matter physics (AdS/CMT)journal article10.1007/JHEP04(2014)149open access