This research introduces a quaternary DNA adder architecture that extends competitive blocking encoding to achieve superior computational efficiency and scalability in molecular computing systems. The design exploits DNA's natural four-nucleotide alphabet to encode computational states directly into molecular representations, doubling information density compared to binary DNA adders.
Key findings
The quaternary adder achieves 2× higher computational throughput per reaction volume compared to binary equivalents.
The architecture introduces a quaternary digit encoding system, an Extended Competitive Blocking circuit, and a hierarchical carry propagation mechanism.
Theoretical analysis and experimental designs support 8-quaternary-digit addition, equivalent to 16-bit binary addition.
Limitations & open questions
Potential failure modes include signal leakage, incomplete displacement reactions, and concentration-dependent decay.