Free energy and Zero Point Field sound like interesting concepts, though I don't really understand them. Regarding Zero Point Field, do you mean to say that only if a system almost completely run out ...
Zero-point energy is not strictly a function of Absolute Zero. It is the energy present in mass when all the heat 9and other residual energy) has been removed. We approach it when we study Bose-Einstein condensate.
It is very much a theoretical state although a number of scientists have done quite a bit of work.
Rocmike aka American Patriot so far has 7 hours of posting under its alias Wilber Tanner, over an hour of posting under its alias Bob Suffolk and over 3 hours of posting under its alias Bill who is still posting. All repeating the same thing over and over and going to old questions and answers no one has been on in a long time. GET A LIFE.