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This Defense Intelligence Reference Document from the Defense Intelligence Agency is dated 11 January 2011. It was produced in FY 2010 under the Advanced Aerospace Weapons System Applications (AAWSA) Program. It reviews negative, or sub-vacuum, energy found in squeezed light and the Casimir effect, and explains quantum optical homodyne tomography as a way to measure and map that energy in the lab. It proposes balanced homodyne detector arrays that could help detect anomalous aerospace platforms using engineered spacetime propulsion.
UNCLASSIFIED/ ,'-F8A 8FFI~II k !PSS ODIi Y collapsed-matter singularities in their study of cosmology and black hole physics. More specifically, classical general relativity allows one to prove lots of general theorems about the behavior of matter in gravitational fields. However, real physical matter is not "reasonable" because the energy conditions are in general violated by semiclassical quantum effects (occurring at order 11) [9].= More specifically, quantum effects generically violate the average NEC (ANEC). Furthermore, it was discovered in 1965 that quantum field theory has the remarkable property of allowing states of matter containing local regions of negative energy density or negative fluxes [3]. This violates the WEC, which postulates that the local energy density is non- negative for all observers. And there are also general theorems of differential geometry that guarantee that there must be a violation of one, some, or all of the energy conditions (meaning exotic matter is present) for all FTL and antigravity spacetimes. However, all of the energy condition hypotheses have been experimentally tested in the laboratory and experimentally shown to be false - 25 years before their formulation [ll]. In quantum field theory, negative energy is a manifestation of what is now called the "sub-vacuum" levels of the quantum zero-point (or vacuum ground state) fluctuations that correspond to any particular quantum field of matter under study. Hence, the energy corresponding to sub-vacuum quantum fluctuations is now called "sub-vacuum energy": sub-vacuum energy= negative energy. Further investigation into this technical issue showed that violations of the energy conditions are widespread for all forms of both "reasonable" classical and quantum matter [12-16]. Furthermore, Visser [9] showed that all (generic) spacetime geometries violate all the energy conditions. So the condition that PE> /Ji and/or PE~ 0 must be obeyed by all forms of matter in nature is spurious. Negative energy has been produced in the laboratory and this will be discussed in the following sections. Examples of Negative (Sub-Vacuum) Energy Found in Nature The exotic (energy condition-violating) fields that are known to occur in nature are: 1. Static, radially-dependent electric or magnetic fields. These are borderline exotic, if their tension were infinitesimally larger, for a given energy density [10, 17]. 2. Squeezed quantum vacuum states: electromagnetic and other (non-Maxwellian) quantum fields [8, 18]. 3. Gravitationally squeezed electromagnetic vacuum fluctuations [19]. 4. Casimir effect, i.e., the Casimir vacuum in flat, curved, and topological spaces [20-28]. 5. Other quantum fields/states/effects. In general, the local energy density in quantum field theory can be negative due to quantum coherence effects [3]. Other examples that have been studied are Dirac field states: the superposition of two single particle electron states and the superposition of two multi-electron- positron states [29, 30]. In the former (latter), the energy densities can be negative when two single (multi-) particle states have the same number of ' Planck's reduced constant, '1 = 1.055 x 10-34 J.s. 4 UNCLASSIFIED/;CF8A 8FFI&I.«11! 1!181! 8Hl:V
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 51 pages are in the text index: search them above, or from the library's search.