Decay of a thermofield-double state in chaotic quantum systems - From random matrices to spin systemsA. del Campo, J. Molina-Vilaplana, L.F. Santos and J. SonnerEur. Phys. J. Special Topics, 227 3-4 (2018) 247-258DOI: https://doi.org/10.1140/epjst/e2018-00083-5