2020/04/17 by Giordano Scappucci, Christoph Kloeffel, Floris A. Zwanenburg +6 · 4 citations
Engineering · Physics and Astronomy · #Leverage (statistics) #Nanowire Synthesis and Applications #Quantum #Quantum and electron transport phenomena #Quantum computer #Quantum dot #Quantum gate #Quantum information #Quantum information processing #Quantum technology #Qubit #Topological Materials and Phenomena #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1038/s41578-020-00262-z
published as Nat Rev Mater (2020)
arxiv created 2020/04/17 · openalex created_date 2020/04/24 · openalex publication_date 2020/12/21 · arxiv updated 2020/12/23 · openalex updated_date 2026/08/05
In the worldwide endeavor for disruptive quantum technologies, germanium is emerging as a versatile material to realize devices capable of encoding, processing, or transmitting quantum information. These devices leverage special properties of the germanium valence-band states, commonly known as holes, such as their inherently strong spin-orbit coupling and the ability to host superconducting pairing correlations. In this Review, we initially introduce the physics of holes in low-dimensional germanium structures with key insights from a theoretical perspective. We then examine the material science progress underpinning germanium-based planar heterostructures and nanowires. We review the most significant experimental results demonstrating key building blocks for quantum technology, such as an electrically driven universal quantum gate set with spin qubits in quantum dots and superconductor-semiconductor devices for hybrid quantum systems. We conclude by identifying the most promising prospects toward scalable quantum information processing.