Documents / Official release
This Defense Intelligence Reference Document, dated 30 March 2010, was prepared by the Defense Intelligence Agency's Defense Warning Office under its Advanced Aerospace Weapon System Applications Program. It reviews quantum entanglement, nonlocality and EPR experiments, and asks whether nonlocal quantum effects could carry observer-to-observer signals faster than light. The paper describes proposed experiments and an example of real-time Earth control of a Mars rover. It concludes that there is no compelling answer yet and that experimental tests are needed.
From the source: Release of 2026-09-18 Incident: 3/30/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD reviews quantum entanglement and nonlocality with a focus on whether those phenomena might be usable as a means of faster-than-light communication between observers, especially for real-time space operations over interplanetary distances. The report surveys the relevant quantum experiments and no-signal theorems, then examines proposed communication schemes based mainly on momentum-entangled photons, including scenarios involving superluminal and retro-causal signaling. However, it repeatedly acknowledges that the central question remains unresolved experimentally, and it gives substantial attention to the coherence-versus-entanglement tradeoff and other features of standard quantum mechanics that may prevent usable signaling even if non-local correlations are experimentally validated. Overall, the document is an exploratory analysis of whether quantum nonlocality could conceivably support a practical communications application rather than a demonstration of prospective utility.
f -,702nm )> -, (0 0 ::J 0 ::J rQ) Cl) (1) UNCLASSIFIED/ /FOR OFFICIAL ".!l! Grit I which are linearly polarized horizontally (HLP) and are transmitted by the splitter. As Dopfer has shown, because of momentum entanglement, an image of slit system S1 will be formed by the "e" photons linearly polarized vertically (VLP) at a path length f beyond the lens on the deflected path at position S2 1 where a pair of "cleanup" slits are located that pass only those photons whose entangled twins passed through S1. We note that because of the optical geometry, this imaging occurs even for waves that pass through both of the image points and ultimately interfere. BBO VLP 351 nmDouble Convex Lens - Focal Length = f c::::= :t:::=::::>--.--- Camera "O" u 1 11 Figure 7. Slit-Imaging Coincidence-Free Version of the Ghost Interference Experiment to Demonstrate Nonlocal Communication At the image position of each slit at S2, we place an optical fiber, as shown. The fibers conduct the light to an optical switch, at which the light either is sent directly to two avalanche photodiode detectors D (providing which-way information about which of the S1 slits the photon entered) or alternatively is routed to an optical combiner C, with the in-phase output of the combiner then detected, so that waves passing through both slits can contribute constructively to the detection event. We note that this fiber switching system is the fiber-optic equivalent of a Mach-Zehnder interferometer (Reference 20), in which one can activate and deactivate the last half-silvered mirror by switching, so that which-way information can be switched on and off. (We also note that similar fiber-combiner-detector technology could be employed after the S1 slits to IR Pass Filter VLP 702nm D IR Pass Filter HLP Object Slits Path to Lens =f Image Slits Path to Lens= f s1 UNCLASSIFIED/ /FOA OFFICIO ls: Pili ODIi.¥ 12
Not linked to a story yet.
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 32 pages are in the text index: search them above, or from the library's search.