Decoherence of multipartite entanglement states under amplitude-damping environment in non-inertial frames Kwang-Il Kim, Myong Chol Pak and Tae-Hyok Kim Eur. Phys. J. D, 74 6 (2020) 124 Published online: 16 June 2020 DOI: 10.1140/epjd/e2020-10098-3