Hyperbolic ring based formulation for thermo field dynamics, quantum dissipation, entanglement, and holographyR. Cartas-Fuentevilla, J. Berra-Montiel and O. Meza-AldamaEur. Phys. J. C, 80 7 (2020) 603DOI: https://doi.org/10.1140/epjc/s10052-020-8161-x