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This Defense Intelligence Reference Document (DIA-08-1003-018), dated 30 March 2010, was produced by the Defense Intelligence Agency as part of its FY 2009 Advanced Aerospace Weapon System Applications (AAWSA) Program. It reviews theoretical approaches to antigravity for aerospace propulsion, drawing on Newtonian physics, general relativity, cosmological dark energy and quantum vacuum effects. The report notes that no current technology can actively control gravity and that many concepts are far from practicable engineering.
UNCLASSIFIED//FOR QFFICICk YEE a••k>/ nonlinear gravitational permeability, which could dramatically mitigate such large-scale requirements (see item 1 below for further discussion). Negative energy has been produced in the lab in very small quantities. The technologies used for producing negative energy are nascent, and so it will be some time before it can be ascertained whether they are capable of producing the astronomical amounts of negative energy required to generate significant antigravity forces as discussed in Section III-C-2 (see item 2 below for further discussion). Antigravity forces produced by quantum electromagnetic vacuum ZPF or by nonretarded quantum interatomic dispersion forces in a curved spacetime (that is, gravitational field) are very feeble, but there are proposals based on other theoretical and empirical studies which suggest that these forces can be amplified to macroscopic level. However, there are a number of difficult technical challenges to overcome in order to achieve success. Going forward toward the demonstration of an antigravity generator will require the following steps to be taken: • Antigravity via Dipole Gravitational Field Generators: Presently, the technology does not exist to achieve the astronomical mass densities, extreme velocities or accelerations of mass motion, and the large device dimensions required to produce large enough antigravity forces for useful propulsion. The issues are: 1) dense materials, and 2) gravitational properties of matter. Forward (Reference 14) suggests investigating neutron-neutron interactions. One could cool a gas of thermal neutrons from a nuclear reactor to extremely low temperatures using magnetic confinement or magneto-gravitational traps, and concentrate them into a small region through the interaction of the trap's magnetic field with the magnetic moment of the neutrons. The Fermi energy 12 of the bound neutrons limits the neutron density to~ 10 3 kg/m 3 . However, the formation of putative tetraneutrons 13 or the existence of a superconductive-type phase space condensation will create bosons that do not have this limitation. It turns out that exotic quantum states of matter such as Bose-Einstein (BE) and Fermionic condensates 14 transcend the Fermi energy limit and thus possess highly unusual material properties. BE condensates were first created in 1995 and Fermionic condensates were first created in 2003, but both are still undergoing laboratory exploration. As for the gravitational properties of matter, one knows from electromagnetism that the permeability (~t) of magnetic materials such as iron is anomalously large and nonlinear, which allows for the construction of highly efficient electromagnetic field generators. The gravitational equivalent to the magnetic permeability is a property of matter that is still largely unexplored. A material possessing an anomalously large, very nonlinear gravitational permeability (ri) would be useful in the construction of highly efficient, very small scale gravitational field generators. One would expect all materials to have an 11 that is different from 110 because the atoms comprising any material have quantum spin. Forward "In condensed matter physics, this is the energy of the highest occupied quantum state in a system of fermions (that is, spin-½ particles such as electrons, nucleons, or atoms) at zero absolute temperature. 13 A hypothetical stable cluster of four neutrons whereby recent empirical evidence suggests it exists. Readers should consult the technical literature for more information by using "tetraneutrons" as a search term. 14 BE or Fermionic condensates are a macroscopic collection of bosons (spin-1 particles such as nucleons or atoms) or fermions that collapse into the same quantum state when they form at near-zero absolute temperature. 25 UNCLASSIFIED//F8R 8FFI@Itllt ""I! one I
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 44 pages are in the text index: search them above, or from the library's search.