Underlying Explanation of Superconducting Mechanism by Spacetime‑Quantum‑Field Theory and Theoretical Possibility of Ambient‑Pressure Room‑Temperature Superconductivity

A Dual-Channel Spacetime-Quantum Approach to High-Temperature Superconductivity and the Possibility of Ambient-Pressure Room-Temperature Superconductivity Conventional superconductivity theories, including the Bardeen-Cooper-Schrieffer (BCS) theory, Eliashberg theory, and spin-fluctuation approaches, treat spacetime as a fixed background and therefore cannot provide first-principle explanations for many anomalous phenomena observed in high-temperature superconductors. They also do not answer whether ambient-pressure room-temperature superconductivity is fundamentally allowed by nature. Based on a self-consistent spacetime-quantum-field cosmological framework originally conceived in the late 1990s and recently completed through mathematical development with the assistance of AI-based tools, this work proposes a dual-channel theory of superconductivity. In this framework, conventional low-temperature superconductivity remains dominated by phonon-mediated Cooper pairing. High-temperature superconductivity, however, emerges from the renormalization and mesoscopic amplification of local spacetime-quantum fluctuations by many-body electronic structures within crystalline materials. The fundamental spacetime-quantum-field coupling in vacuum is extremely weak and remains consistent with existing high-precision particle-physics constraints. Within condensed-matter systems, the effective pairing interaction can be amplified by factors of approximately 10^10–10^12 through collective electronic effects. Self-consistent numerical solutions indicate the existence of theoretical parameter windows that permit ambient-pressure room-temperature superconductivity. However, such states require highly restrictive material conditions and are therefore expected to be exceedingly rare in nature. The theory generates several experimentally falsifiable predictions. Long-standing phenomena including the pseudogap state, anomalous isotope effects, and non-monotonic pressure responses observed in cuprate superconductors receive natural interpretations within this framework.