Anisotropy-Induced Decoherence-Free Subspaces at Critical Dimension d=4 - Data and Code

Numerical data and supplementary materials for "Anisotropy-Induced Decoherence-Free Subspaces: Breaking the Dimensional Scaling Limit of Quantum Dissipation" (Shvets, 2026). KEY RESULT: Sharp phase transition at d=4 where contraction coefficient η jumps to 1.0000, indicating perfect quantum information preservation under anisotropic noise. CONTENTS: - research_paper.pdf: Full manuscript with analytical proof - supplementary_materials.txt: Numerical verification details - figures: Phase transition ("Yellow Wall") and robustness analysis METHOD: Riemannian gradient descent optimization of quantum Jensen-Shannon divergence contraction coefficient. MECHANISM: Commutative subalgebra [X², Z²]=0 creates protected parity sectors for d≥4.