Please have pity on a poor ignorant layperson struggling for understanding... and keep in mind that I am mathematically impotent. I am trying to wrap my mind around the concept of expanding space-time with regard to quantum foam. Could someone please explain whether the "density" of quantum foam decreases in an area of "expanded" space. Does the distribution of virtual (transient) point particles become more diffuse relative to less expanded space? Is there less potential information content?