We also show that the model has no tachyonic modes.
L. F. F. Freitas, G. Alencar, R. R. Landim 2019, 'Universal aspects of U(1) gauge field localization on branes in D-dimensions', Journal of High Energy Physicshttp://link.springer.com/article/10.1007/JHEP02(2019)035. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
We do not observe any evidence in favour of tachyonic mode existence.
E.V. Luschevskaya, O.E. Solovjeva, O.A. Kochetkov, O.V. Teryaev 2015, 'Magnetic polarizabilities of light mesons in SU(3) lattice gauge theory', Nuclear Physics Bhttp://www.sciencedirect.com/science/article/pii/S0550321315002631. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Here, we propose an experimental model of tachyonic dark energy based on hyperbolic metamaterials.
Igor I. Smolyaninov 2014, 'Metamaterial Model of Tachyonic Dark Energy', Galaxieshttp://www.mdpi.com/2075-4434/2/1/72. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Moreover, the massive tachyonic modes can be excluded.
Zhen-Hua Zhao, Qun-Ying Xie 2018, 'Localization of U(1) gauge vector field on flat branes with five-dimension (asymptotic)AdS5 spacetime', Journal of High Energy Physicshttp://link.springer.com/article/10.1007/JHEP05(2018)072. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
We demonstrate that this model has a self-interacting tachyonic sector having negative effective pressure and positive effective energy density.
Igor I. Smolyaninov 2014, 'Metamaterial Model of Tachyonic Dark Energy', Galaxieshttp://www.mdpi.com/2075-4434/2/1/72. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)