Interviews: Giovanni Organtini Answers About the Higgs and LHC - "If you want me to speculate, I can imagine that gravity comes into play because the Universe tends to remain stable. The Higgs mechanism predicts that an empty Universe is unstable, while a Universe with some amount of the Higgs field is stable, because its energy is lower than an empty Universe. We call this condition the vacuum condition (i.e. vacuum does not correspond to 'empty', but to 'minimum energy'). What I imagine is that there should be some mechanism according to which fluctuations of the vacuum produces Higgs bosons that must interact in such a way that the energy of the Universe is conserved. And this may generate gravity. Though, again, I have not a coherent formulation of such a principle."and btw...
A survey of the Universe - "Because everything is attracted to everything else by gravity, that gravity is acting, in effect, as negative energy. Add together the negative gravitational energy in the universe and the positive energy (including all the mass around), and the result is zero. Or so Dr Linde and Dr Vilenkin assert. And observations of the amount and distribution of stuff in the universe do not contradict them. Given that the universe actually consists of nothing at all, explaining its existence becomes rather easier. The separation of the nothing into energy and gravity is a result of the uncertainty principle." [1,2,3]
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