Conformal Scalar Coherence (CSC) is a symmetry-grounded scalar-tensor framework in which a single real pseudo-dilaton field provides a common structure for late-time cosmic acceleration, gravitational decoherence, and a conjectural exterior information channel in black-hole evaporation. The field couples conformally and universally to matter through the stress-energy trace, as the canonical low-energy realization of approximately broken dilatation symmetry. Within the minimal effective theory, scalar-potential dynamics contribute to dark energy alongside an input vacuum-energy sector, while structurally compatible ultraviolet pathways, including sequestering, dynamical damping, and asymptotic-safety fixed-point flow, define possible completions rather than established results. The field’s vacuum correlations set a coherence crossover at its Compton scale. The leading decoherence mechanism is dynamical soft-scalar emission: time-dependent branching generates branch-dependent soft dressings, and their reduced overlap suppresses interference. From this coupling structure, CSC yields tree-level photon immunity, near-exact spin and polarization selectivity, size-independence in the unresolved regime, and a mass-squared scaling law for spatial-superposition decoherence rates, with exact ratio theorems within the universal-screening class via charge-kernel factorization. In the black-hole sector, the scalar is effectively massless near the horizon, which motivates a mathematically specific soft-memory channel; however, the full information-recovery claim remains conjectural pending a CSC-specific Page-curve derivation.
Benjamin Sullivan (Sun,) studied this question.