Sudden singularities in semiclassical gravity

Understand

It has been claimed in a recent paper \cite{bbfhd12} that sudden singularities will survive in semiclassical gravity.

• This issue is here carefully reviewed, pointing out that such conclusion, even if valid under some specific conditions, does not stand in other cases.
• An explicit example is studied in detail to support our statement, stemming from these other situations, that quantum effects may in fact drastically modify the behavior of sudden singularities.