Macroscopic Room-Temperature Quantum Coherence via Active Topological Screening and Chern Boundary Nullification

The preservation of macroscopic quantum coherence at room temperature is severely fundamentally limited by thermal phonon scattering and metric vacuum fluctuations. Current paradigms treat thermal decoherence as stochastic noise, necessitating dilution refrigeration. In this Letter, we demonstrate the stabilization of silicon-germanium (SiGe) spin qubits at 300K via active topological screening. By modeling decoherence as a deterministic geometric interaction, we introduce a continuous-variable feedback mechanism that calculates environment-induced Berry curvature distortions. A coupled Organic Electrochemical Transistor (OECT) array injects a compensatory gauge field, dynamically enforcing a zero total Chern number (Ctot = 0). This synthetic topological protection suppresses wave-function collapse, extending coherence times into the microsecond regime without passive cooling. Our findings open a new pathway for realizing topologically protected quantum matter at ambient thermodynamic conditions.