From black hole to white hole via the intermediate static state

We discuss the macroscopic quantum tunneling from black hole to white of same mass. Previous calculations in Ref.[1] demonstrated that probability is $p \propto \exp(-2S_\text{BH})$, where $S_\text{BH}$ entropy Schwarzschild hole. This particular suggests with minus sign hole, $S_\text{WH}(M)=- S_\text{BH}(M)= - A/(4G)$. Here we use a different way calculations. consider three types objects: and fully static intermediate state. The transitions between these states found using singularities coordinate transformations objects. holes are described by Painleve-Gullstrand coordinates opposite shift vectors, while state coordinates. lead imaginary part action, which determines exponent. For negative obtained, -- has zero entropy. procedure extended Reissner-Nordstr\"om its partners, also temperature de Sitter Universe.