Path integral derivation of the thermofield double state in causal diamonds

Abhijit Chakraborty, Carlos R. Ordóñez, Gustavo Valdivia-Mera

In this article, we adopt the framework developed by R. Laflamme in \textit{Physica A}, \textbf{158}, pp. 58-63 (1989) to analyze the path integral of a massless -- conformally inv…