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This Defense Intelligence Reference Document (DIA-08-1003-016), dated 30 March 2010 and produced by the Defense Intelligence Agency under its Advanced Aerospace Weapon System Applications (AAWSA) Program, reviews quantum entanglement and nonlocality. It asks whether they could carry observer-to-observer signals faster than light or backward in time, with real-time control of a Mars rover as an example. It finds no compelling answer yet and says the question must be settled by experiment.
UNCLASSIFIED//FIHl 8FFHil.tzk Wili &HkY Contents Foreword and Introduction .................................................................................... iv I. Quantum Entanglement, Non locality, and EPR Experiments ............................... 1 II. The Quantum No-Signal Theorems .................................................................... 4 III. Nonlocality Versus Special Relativity? ............................................................. 5 IV. Momentum Domain Entanglement and EPR Experiments .................................. 5 V. Coherence-Entanglement Complementarity ..................................................... 10 VI. Nonlocal Communication Versus Signaling ..................................................... 11 VII. A Transactional Analysis of the Nonlocal Communication Test ...................... 13 VIII. Superluminal and Retrocausal Nonlocal Communication ............................. 17 IX. Paradoxes and Nonlocal Communication ........................................................ 18 X. Superluminal Communication without Paradoxes ............................................ 19 XI. Example: Real-Time Earth Control of Mars Rover ............................................ 20 XII. Another Superluminal Possibility: Nonlinear Quantum Mechanics ................. 22 XIII. Conclusion ................................................................................................... 23 Appendix: Glossary .............................................................................................. 24 Figures Figure 1. Schematic of the 1972 Freedman-Clauser Experiment ............................ 2 Figure 2. Schematic of the 1995 Ghost Interference Experiment of the Shih Group ...................................................................................................... 6 Figure 3. Ghost Interference Position Distributions at X2 ....................................... 7 Figure 4. "Unfolding" the Ghost Interference Experiment ...................................... 8 Figure 5. Schematic of the 1998 Dopfer Experiment .............................................. 9 Figure 6. Thick-Source Effect ............................................................................... 10 Figure 7. Slit-Imaging Coincidence-Free Version of the Ghost Interference Experiment to Demonstrate Nonlocal Communication ........................... 12 Figure 8. Transactional Interpretation Diagrams for Case 1. ................................ 15 Figure 9. Transactional Interpretation Diagrams for Case 2 ................................. 16 ii UNCLASSIFIED/ ,'f811 8ffiliiliR.k Wliilii &,lk'f
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