Escaping the Millikelvin Death Spiral: A Systems Architecture for High-Tc Topological Processing

Abstract

Standard quantum architectures rely on dilution refrigeration to suppress thermal noise, tethering the industry to a non-scalable 20 mK thermal floor. The cooling power at millikelvin temperatures scales poorly, creating a “mainframe constraint” that limits widespread deployment. Here, a 4-Kelvin topological processor is proposed, utilizing twistronic symmetry breaking in Bi-2212 to engineer a 25 meV spectral gap. By integrating this intrinsic protection with RSFQ control logic and pulse tube cryogenics via a flip-chip architecture, a stability margin of $\Gamma \approx 20$ is achieved even with interface losses. This architecture eliminates the need for dilution refrigeration, enabling scalable, rack-mounted quantum processing.