Topological Superconductivity and Majorana Zero Modes in Bismuth-Nickel Chains Confined in Chabazite Zeolite

We predict that bismuth and nickel atoms co-confined in chabazite (CHA) zeolite real- ize a self-contained one-dimensional topological superconductor hosting Majorana zero modes. The platform exploits four confinement effects: (1) Bi atomic chains exhibit Z_2 = 1 topological character with 600 meV spin-orbit coupling from s-p band inversion; (2) quasi-1D Ni confinement suppresses ferromagnetism via the Mermin-Wagner theorem, enabling superconductivity at T_c ~ 7-25 K; (3) residual inter-chain ordering provides an internal Zeeman field V_Z = 3.66 meV via direct Bi-Ni s-d exchange at d = 2.8 Angstrom; and (4) the Kitaev criterion is satisfied with V_Z/Delta = 2.61, yielding a topological gap of 1.29 meV and Majorana coherence length 133 nm. No external magnetic field, prox- imity superconductor, or dilution refrigerator is required: the system operates at 3.0 K with spin-orbit coupling 2,400 times that of InSb nanowires. These predictions identify zeolite-confined atomic chains as a scalable route to topological qubits.