Do virtual particles require space?
As some proposed, the origin of the Big Bang was a fluctuation similar to those that create observable particles out of virtual particles. But virtual particles have been proposed as an explanation of fields, and these particles normally occupy physical vacuum (which possesses the property of space). So, do virtual particles need space for their description? As an example of a spaceless "environment" I would think of a universe of a length scale smaller than the Plank's length.
Anyone .... with a PhD in particle physics or QFT maybe ....?