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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.
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signal i, UNCLASSIFIED//FIHl 8FFHil.t.k Wfili IH.k\f detector L,r-' •"a, ., <lj vacuum local oscillator (a,o) •"a, detector Figure 11. Balanced Homodyne Detector Using Fictitious Beam Splitters to Account for Detection Losses. (courtesy of Ulf Leonhardt) Equation (12) provides an additional model for detection losses. Similar to direct photon counting, a fictitious vacuum field has to be added to the attenuated signal in homodyne detection. This means that we can replace the arrangement of two fictitious beam splitters in front of the photodetectors with just one effective beam splitter in front of an ideal homodyne detector (see Figure 12). This effective beam splitter accounts for other kinds of losses including mode mismatch, whereby the quantum effects of both detection losses and mode mismatch are comprised in an effective 11· 31 UNCLASSIFIED//P&tl err1e1111t ~:!I! 8HLY
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