Thermodynamic Scaling of 4-Kelvin Topological Processors via Twistronic Bi-2212 Heterostructures

Standard superconducting quantum processors are currently constrained by the thermodynamic bottleneck of millikelvin dilution refrigeration, which precludes the integration of high-speed control logic and limits scalability. This reliance on the 20 mK regime creates a “mainframe constraint” where the cooling infrastructure scales non-linearly with computational volume. Here, a 4-Kelvin topological processor architecture is introduced, utilizing twistronic Bi-2212 heterostructures with a 30 meV spectral gap. By engineering a time-reversal symmetry broken state at a 45-degree twist angle, a “thermal firewall” is established that suppresses decoherence ($\Gamma \approx 80$) at temperatures accessible to industrial pulse tube cryocoolers. This architecture enables the co-location of energy-efficient RSFQ control logic with the quantum plane, redefining the system as a portable, deployable technology.