FWIW, a friend who is a Ph.D. physicist had this to say about possible mechanisms... see below. -Mark
Look into Prof. Leif Holmlid from the University of Gothenburg... He claims that he produced 'superdense' deuterium and when he shoots a green laser pulse on it (which causes 'Coulomb explosion', meaning the intense laser light strips all the electrons of the superdense deuterium) he gets fusion. When he measures the fast deuterium ions coming from the Coulomb explosion, (he uses a time-of-flight measurement to determine the speed and from that) he can deduce the internuclear distance from that. I think it is about 1000 times more dense than regular deuterium. This also sounds a little like 'hydrinos' but Prof. Winterberg tries to explain this through a Bose-Einstein condensation. The nucleus of the deuterium is already a Bose particle (spin 0 or 1 here) and the electrons (Fermi particles) have 1/2 spin but if they could couple, similar to a superconductor, then a whole bunch of deuterium could form a Bose-Einstein condensate and it follows a different statistic. Winterberg suggests that the electrons form a vortex and the deuterium nuclei are circling this vortex and this allows a very small orbit, therefore a superdense state.
