[DEPRECATED]Mechanism Discrimination of Decoherence in High-Dimensional Quantum Systems: A Systematic Experimental Proposal

⚠️ IMPORTANT: This manuscript is deprecated. The decoherence experiments designed based on the earlier framework presented here have been fundamentally revised and superseded by a rigorous derivation from first principles. Please refer to the corrected framework:[Exact Relation between Internal Dissipation Power and Energy Relaxation Rate: A Rigorous Derivation in Markovian Quantum Systems]DOI: 10.5281/zenodo.18624328Zenodo: https://zenodo.org/records/18624328 Version1: Quantum decoherence is a fundamental physical process connecting quantum theory with the classical world. Standard decoherence theory predicts that quan tum coherence decays exponentially to zero under strong environmental perturba tions. However, whether the complex Hilbert space structure of high-dimensional quantum systems leads to deviations from this standard picture remains an open frontier question. This paper presents a systematic experimental framework to dis criminate and separate three potential decoherence mechanisms in high-dimensional photon orbital angular momentum systems: standard Markovian decoherence (H0), non-Markovian memory effects (HNM), and potential non-classical behavior (H1). The scheme employs dual criteria of “noise spectrum fingerprint” and “environ mental control,” combined with Bayesian model comparison, forming a closed-loop mechanism diagnostic workflow. Theoretical analysis indicates that when system Hilbert space dimension reaches a critical range (d ≥ 7), non-classical behaviors may emerge: visibility saturation at a non-zero value under strong decoherence (Vsat ≈ 0.25), accompanied by non-monotonic revival of entanglement measure with increasing dimension. This work’s primary contribution is its methodologi cal innovation—establishing a generalizable, rigorous framework for discriminating competitive decoherence mechanisms in complex quantum systems.