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This Defense Intelligence Reference Document from the Defense Intelligence Agency is dated 2 April 2010 and was produced under the Advanced Aerospace Weapon System Applications (AAWSA) Program. It is one of a series of advanced technology reports from FY 2009. It reviews general relativistic warp drives, the cosmological constant, Casimir energy and extra space dimensions. It proposes that dark energy may come from higher dimensions and that controlling those dimensions could one day make a warp drive possible.
UNCLASSIFIED//P:Sll SPP:ICIIIIL lt91! eutY Higgs, and therefore the greater the mass. The second brane is the UV or "hidden" brane. The line element in RS1 is described by the metric: d 2 -2ki IP d a ,.J,.• "d/4's =e • r;,,.. x· u..f -r 'I' . (5.4) ,7.,,l' is the metric tensor for the D-dimensional Minkowski spacetime, the AdS curvature radius is given by 1/k and the interbrane separation is given by r. The 5th dimension is compactified on the orbifold of length a, where a < cp < a. The orbifold fixed points located at cp= 0 and cp= a correspond to the location of the visible and the hidden brane. The exponential factor is referred to as the warp factor and is an appealing feature in the RS1 model, as it can both generate a TeV mass scale from the Planck scale in the higher dimensional theory and reduce the effective gravitational strength on the visible brane through the suppression factor e 21.rl 9I while retaining a bulk width that is only a couple of orders of magnitude above the Planck scale. In addition to the stabilization of the interbrane separation, the quantum effects from the bulk fields (aka the Casimir energy) can also provide a mechanism for the generation of dark energy on the visible brane. 5.4 EXTRA DIMENSION SUMMARY Although there is still no direct evidence of extra spatial dimensions, there is the possibility that the experiments planned at the Large Hadron Collider could detect particle decay signatures that would indicate the presence of higher dimensions. In fact, all the theoretical groundwork has been performed by theorists, and as soon as the LHC is running smoothly it could, in principle, demonstrate the existence of higher dimensions in a relatively short period of time. Any such discovery would represent a truly radical alteration of our understanding of nature, and many new questions will emerge regarding the potential role extra dimensions could play in advanced technologies (which will be discussed in more detail later in this paper). 6. Dark Energy as a Higher Dimensional Artifact As discussed earlier, the vacuum of spacetime can be visualized as a sea of quantum fields never fully at rest due to the Heisenberg Uncertainty Principle. The oscillations of the vacuum radiate energy over a range of frequencies in much the same way that an oscillating electron emits electromagnetic energy, and in this way, there exists a ground state energy associated with space itself. The vacuum potential for a periodic scalar field in the ADD model described above is given by (Reference 48-50): ( 6.1) where k is the momentum modes of the quantum fields, R is the radius of the 5th dimension, and mis the mass of the field. The prime on the summation indicates the n = 0 term is excluded. The integral over the continuous momentum modes of the 12 UNCLASSIFIED//FOR OFFICIPk WCi 0Plk¥
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 33 pages are in the text index: search them above, or from the library's search.