Qubit ZooComprehensive review of germanium as a quantum computing platform. Covers the unique advantages of Ge hole spin qubits: strong spin-orbit coupling for all-electrical control, low effective mass for large quantum dots, compatibility with Si CMOS processing, and natural isotopic purification (⁷⁰Ge, ⁷²Ge, ⁷⁴Ge, ⁷⁶Ge are all spin-0).
Key Results
- Strong Rashba spin-orbit coupling enables EDSR without micromagnets
- Heavy-hole g-factor anisotropy provides addressability
- Natural Ge has 4 stable spin-0 isotopes (easier purification than Si)
- Ge/SiGe heterostructures: high hole mobility >10⁶ cm²/Vs
- Compatibility with superconducting hybrids (Ge-Al, Ge-Nb)
Links
- Journal: Nature Reviews Materials
- arXiv: 2004.08133