Gravitational Decoherence as a Spectral Coherence Limit in General Relativity as a Quantum Theory

Recent models have demonstrated that quantum superpositions undergo inevitable decoherence due to gravitational time dilation, even in the absence of external classical environments. In this work, we show that such results can be naturally misinterpreted within the context of General Relativity as a Quantum Theory (GRQT) as a consequence of the geometric spectral stability of spacetime. Without modifying the known dynamic formalism, we interpret the decoherence time as an operational coherence limit imposed by the spectral discretization of geometry. The approach remains conservative, introduces neither new fields nor collapse mechanisms, and suggests experimental regimes where the effect can be tested.