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This Defense Intelligence Reference Document, dated 10 December 2010, was prepared by the Defense Intelligence Agency's Defense Warning Office under the Advanced Aerospace Weapon System Applications program. It examines quantum computing and DNA-based molecular computing as options for onboard supercomputing in future spaceflight. It forecasts working ion trap quantum computers within 10 years, simple DNA tile computing within 20 years, and self-repairing DNA computers and hybrid quantum dot systems on a 40-year horizon.
From the source:Release of 2026-09-18 Incident: 12/10/10, 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 surveys advanced computing concepts for future space and automation applications, focusing on quantum and molecular (DNA-based) computing as potential alternatives to conventional silicon electronics. The report introduces quantum computing principles alongside DNA-based logic gates, self-assembly, and nanoscale repair mechanisms, arguing that these unconventional architectures might eventually offer advantages in radiation tolerance, physical robustness, and specialized onboard processing for space-based platforms. It notes that near-term practical barriers remain substantial. Quantum systems continue to depend on complex cryogenics, shielding, and unsolved reliability challenges, while DNA-based computing remains a far-future concept rather than a viable alternative to general-purpose processors. Overall, the document presents both frameworks as long-term possibilities to complement, rather than immediately replace proven space-qualified electronics. It concludes that the stronger, nearer-term cases for such architectures are in highly specialized or hybrid roles rather than in fully mature general-purpose onboard computing applications.
UNCLASSIFIED/ /FOR: 8Pfl@IAL YSli &Pn,¥ Research with Graphene Quantum Dots Graphene is an ideal candidate for spin qubits due to its low intrinsic spin-orbit coupling and the sparse amount of nuclear spins. We discussed bound states in gate-tunable graphene quantum dots realized in both graphene nanoribbons and gapped single- layer and bilayer graphene. In contrast to quantum dots rea lized in edged graphene flakes, gate-tunable quantum dots are defined electrostatically rather than by the physical edge of a graphene sample. Th is allows one to controllably break the valley degeneracy, a prerequisite for spin based quantum computing, e.g., by using a magnetic fie ld. We have also discussed quantum manipulation of spin qubits in such dots, as well as recent theoretical studies on the consequences of spin-orbit interaction and hyperfine interaction with nuclei for sp in relaxation and sp in-decoherence . Both theoretical and experimental efforts have focused on single-layer graphene quantum dots. The next major area is likely to be bilayer graphene. Bilayer graphene is potentially superior to sing le-layer graphene due to the creation of a tunable bandgap by electric fields which allows for an all electrical control of graphene quantum dots . These new capabilities may be a boon for spintron ic quantum information processing. Single-qubit gates, based on single-spin electron spin resonance, have ach ieved sign ificant breakthroughs. Fast ( ~200 ps) two-qubit operation has been demonstrated, but single-qubit operations on a similar time scale still remain a challenge. A proposed new configuration of two-spin encoding of the qubit, where a sing le and a triplet state play the role of the 0 and 1, shows promise. With this type of qubit, the interferometer, demonstrated by the Princeton researchers, could be used for single-qubit gates on a nanosecond t ime sca le. Alternatively, fast qubit rotations in a slightly different singlet-triplet qubit can be obtained by align ing nuclear spins to create different nuclear polarizations in the two dots. Fast single-qubit and two-qubit gates ava ilable in the same syst em allow for efficient quant um error correction and could provide an important head start in the battle against decoherence. However, no two qubit gates for this type of qubit, which would involve four spins, have yet been demonstrated. Util izing graphene as a structural basis for quantum computing, coupled with other carbon based materials such as self-assembling DNA, motifs, may lead the revolutionary development in quantum computing. SUMMARY OF ADDITIONAL INORGANIC TECHNOLOGIES The advancement of quantum computing schemes is the subject of sign ificant investment and development over the past two decades. Recently, Ladd reviewed inorganic technolog ies. (5) Ladd proposes that ion traps are the most probable technology based on their long T2, but then concludes that a comparison between the technologies is incomplete without further development on all front s. The current treatise concentrates on organic technology but summarizes here the work of Ladd and others for completeness. Photon Technologies Using the polarization state of a photon is an appealing approach to store, communicate, and manipulate qubits. Photons do not requ ire a vacuum or very low temperature for fa irly good isolation from thermodynamic interactions. They do require special, non-linear media for robust, reliably predictable manipu lation. A major advance in 2001, known as the KLM scheme, showed that a scalable quantum computing was possib le using linear optics and single-photon detectors and sources. (80) The major hurd le, according to Ladd, is photon UNCLASSIFIED/ /EAR OEEICIOI IPiii QNLlf 21
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