In summary, the gedanken experiment of suggests that the holographic entropy bound is necessary for the validity of the generalized second law of thermodynamics.
However, in this work we have demonstrated explicitly that the bound can be violated
in higher-dimensional spacetimes.
At first sight, this finding seems to open a possibility of violating the GSL in the gedanken experiment of.
However, our analysis reveals that hyperentropic systems are actually allowed to exist (they are harmless to the GSL)