GermaniumQuantumBus

GermaniumQuantumBus: Developing a Quantum Bus for Germanium Hole-Based Spin Qubits on Silicon

Quantum computing is set to become one of the most transformative technologies of the coming decades, with the potential to revolutionise sectors including chemistry, pharmaceuticals, artificial intelligence, automotive engineering, finance, and national security. According to McKinsey’s 2024 Quantum Technology Monitor, the quantum technology market (encompassing computing, communication, and sensing) is projected to reach US $198 billion by 2040, and quantum computing alone is expected to lie in the range $28 billion to $72 billion by 2035.

A key challenge to building scalable quantum computers lies in achieving high-fidelity multi-qubit operations across large networks. The GermaniumQuantumBus project directly addresses this limitation by developing a new approach to long-range coupling between spin qubits in semiconductors. Our goal is to create a quantum bus, a mechanism that enables distant qubits to interact efficiently, using exchange interactions in hole-based semiconductor compressively strained germanium quantum dots epitaxially grown on silicon.