hi I think that virtual parcicles were introduced so they could explain some mechanims and stuff and to have such a thing that doesn't interact with (unless some special conditions - strong grav. fields in black holes outskirts) with nothing and doesn't influence on anything since they live so short. So in such approach this energy (which would be positive) even if maeybe real we cannot use in any way nor even distinguish it's presence (which is why we call the energy virtual).
afterall I think we have enough problems with DE, DM, labmda, that why to bother with another form of energy :)
ps. if I know well virtual particles borrow some energy from spacetime so this new positive energy would be balanced with some negative-energy debt in space, I quess. In case of no fields, virtual particles which appear always with their anitparticle counterpart would anihilate (canceling their bills with space) before rest of the world would realised (noticed) that anything happened.
pozdrawiam
******************************************************************************* Bartosz Lew e-mail: szajtan@astri.uni.torun.pl szajtan@phys.uni.torun.pl Centrum Astronomii UMK szajtan@poczta.onet.pl TORUN, POLAND www: http://www.phys.uni.torun.pl/~szajtan *******************************************************************************
On Mon, 2 Dec 2002, Marcin Hajduk wrote:
Hello!
I've got (perhaps silly) a short question. Vacuum is fulfilled by virtual particles (especially photons - I suppose). According to Heisenberg uncertainty principle - dE*dt>h/4*Pi or something like that. So virtual particle with energy dE exist dt seconds (in case there's no other particles nor magnetic field which could give for the virtual photon enough of energy to make it real). But energy of virtual particles is real. So can it influence on evolution of Universe? Can virtual particles appear in all points of space simultaneously?
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