Researchers from the University of Basel and the Swiss Nanoscience Institute have made a significant advancement in the field of quantum computing, with potential implications for the energy sector’s future computing needs. The team, led by Max Beer and including Ran Xue, Lennart Deda, Stefan Trellenkamp, Jhih-Sian Tu, Paul Surrey, Inga Seidler, Hendrik Bluhm, and Lars R. Schreiber, has developed a T-junction device that enables the transfer of single electrons and electron patterns across a two-dimensional grid, a crucial step towards scalable quantum computing architectures. Their research was published in the journal Nature Nanotechnology.
The researchers have demonstrated a method for transferring single electrons and electron patterns through a T-junction in silicon/silicon-germanium (Si/SiGe) devices. This process, known as conveyor-mode shuttling, allows for the adiabatic transfer of electrons confined in quantum dots over several microns with a scalable number of signal lines. The T-junction device links two independently driven shuttle lanes, enabling electrons to be routed across the junction without requiring additional control lines beyond the four channels per conveyor belt.
The team measured an inter-lane charge transfer fidelity of 100% at an instantaneous electron velocity of 270 mm/s. This high fidelity is crucial for maintaining the integrity of quantum information during transfer. Additionally, the researchers controlled the filling of 54 quantum dots using simple atomic pulses, allowing them to swap electron patterns. This capability lays the groundwork for a native spin-qubit SWAP gate, which is essential for quantum error correction and scalable quantum computing.
The practical applications of this research for the energy sector include the potential for more efficient and secure energy management systems. Quantum computing could revolutionize the way energy grids are managed, enabling real-time optimization of energy distribution and consumption. Additionally, quantum computers could be used to model complex molecular structures, leading to the development of new materials for more efficient energy storage and conversion.
While this research is still in the early stages, the development of a T-junction device for electron shuttling represents a significant step towards scalable, two-dimensional quantum computing architectures. The energy sector can look forward to the potential benefits of quantum computing, including improved energy management, storage, and conversion technologies. As the technology matures, it could play a crucial role in the transition to a more sustainable and efficient energy future.
This article is based on research available at arXiv.