According to my internet research, a magnetic field is composed of virtual photons that circulate perpetually. Gravitons are also described as virtual particles when the condition warrants.
In order to conserve the total fermion number of the universe, a fermion cannot be created without also creating its antiparticle; thus many physical processes lead to pair creation. The need for the normal ordering of particle fields in the vacuum can be interpreted by the idea that a pair of virtual particles may briefly "pop into existence", and then annihilate each other a short while later.
Thus, virtual particles are often popularly described as coming in pairs, a particle and antiparticle, which can be of any kind. These pairs exist for an extremely short time, and mutually annihilate in short order. In some cases, however, it is possible to boost the pair apart using external energy so that they avoid annihilation and become real particles.
This may occur in one of two ways. In an accelerating frame of reference, the virtual particles may appear to be real to the accelerating observer; this is known as the Unruh effect. In short, the vacuum of a stationary frame appears, to the accelerated observer, to be a warm gas of real particles in thermodynamic equilibrium. The Unruh effect is a toy model for understanding Hawking radiation, the process by which black holes evaporate.
"Electric power is everywhere present in unlimited quantities and can drive the world's machinery without the need of coal, oil, gas, or any other of the common fuels." -- Nikola Tesla
"Ere many generations pass, our machinery will be driven by a power obtainable at any point in the universe.... it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature." --Nikola Tesla
http://video.google.com/videoplay?docid ... 535911834#
Resistance to acceleration and gravitational attraction between two masses, arise from one unifying principle.
Perpetual motion is prevented by the simple arithmetic of vector addition in a closed system. Counteractive vectors only allow for a finite number of cycles in a closed system.
Each cycle of a closed system subtracts from the initial
starting energy of the system due to counteractive forces like friction, ohmic resistance, etc.
http://www.cheniere.org/techpapers/on_t ... ssible.htm
We develop the major principles of emerging overunity EM power systems as open systems far from thermodynamic equilibrium, freely receiving excess energy from the active vacuum. Such systems were arbitrarily omitted from Maxwell's theory by curtailment. Heaviside's reinterpretation and simplification of Maxwell's equations did retain such overunity EM systems as one major subset. Lorentz then regauged the Maxwell-Heaviside equations by arbitrary symmetrical regauging to provide still simpler equations and a further reduced subset of permissible Maxwell-Heaviside systems. Lorentz regauging erroneously discarded the entire class of Maxwellian EM systems not in thermodynamic equilibrium with the active vacuum.