Experimental Signatures of Entropy-Driven Decoherence in Quantum Interference

Decoherence is widely regarded as the physical mechanism responsible for the transition from quantum interference to classical localization . While the standard frameworksuccessfully describes environment-induced decoherence using density-matrix evolution,it does not identify a microscopic causal quantity that determines how interference suppression depends on thermodynamic conditions. In this work, we propose that decoherence can be understood as an entropy-drivenprocess arising from competition among microscopic causal paths. Within the QuantumCausal Entropy (QCE) framework, quantum amplitudes are modified by an entropyweighted causal rule, Ψ→eiθℓ−∆SℓΨ,leading to a path-amplitude formulation AΓ = exp(iΘΓ −SΓ).From this formulation, interference visibility is shown to depend exponentially on theentropy contrast between competing paths, producing experimentally testable predictions for thermal, material, and measurement environment dependence of interferencepatterns. We present concrete experimental proposals in which interference visibility changescan be measured without modifying phase geometry, allowing a direct test distinguishing entropy-driven decoherence from conventional models. These results suggest thatentropy flow plays a fundamental role in quantum measurement dynamics and coherence loss.