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Research dossier · version 1 · updated Oct 30, 2026

Topological Superconductivity & Majorana Modes: State of the Field (October 2026)

This briefing reviews Majorana zero modes and topological superconductivity as of late October 2026, covering semiconductor-superconductor nanowires, quantum-dot Kitaev chains, vortex and magnetic-atom platforms, and the Majorana parity-qubit program. Its central takeaway is that zero-bias peaks alone do not establish a topological phase, that the protocol used to certify hybrid devices is disputed, and that the newest qubit results are preprints awaiting independent replication.

3,427 words44 sources29 evidence-mapped claims8 benchmarks20 timeline events✓ citation-verified Oct 30, 2026

AI-assisted synthesis of the cited literature, independently fact-checked against its sources; not peer reviewed.

Contents

  1. Executive summary
  2. Background and core concepts
  3. Timeline of key milestones
  4. State of the art
  5. Nanowires and zero-bias peaks
  6. Quantum-dot Kitaev chains
  7. Parity readout and tetron devices
  8. Majorana parity qubit in minimal Kitaev chains
  9. Vortex and magnetic-atom platforms
  10. Quantitative benchmarks
  11. Open problems and active debates
  12. Major programs and players
  13. Outlook: what to watch (near term)
  14. Key papers
  15. Glossary

Sample findings

  • Partially separated Andreev bound states can produce conductance plateaus near 2e²/h over broad parameter ranges without Majorana zero modes.
  • Majorana-like resonances, including zero-bias pinning, become common in InSb nanowire devices at finite magnetic field.
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