The transport of a Spinning Electron can improve Qubit to Qubit connectivity
Researchers of Qutech used a traveling wave potential to displace a quantum dot holding the electron as a whole and reported a significant increase in spin coherence and preserving its spin
From the QuTech website:
Qubit connectivity, the efficiency with which qubits can interact and share information with each other, is a major influential factor in the computational power and fault-tolerance of future large-scale quantum processors. To increase the connectivity between qubits remaining in place, researchers focus on improving qubit-qubit interactions at larger distances. An alternative approach would be to physically relocate qubits on a chip, termed shuttling, thereby increasing the number of potential interactions. For semiconductor spin qubits, several studies have already been performed to investigate spin-coherent shuttling of individual electrons. However, high-fidelity transport over long distances – where almost all electrons maintain their spin when shuttling large amounts – remains to be demonstrated.
Now, researchers at QuTech led by Lieven Vandersypen reported the high-fidelity displacement of an electron spin in an isotopically purified silicon/silicongermanium (Si/SiGe) heterostructure using electric gate voltages. They used a traveling wave potential to displace a quantum dot holding the electron as a whole and reported a significant increase in spin coherence. Using this method, the electron was able to ride the wave over a large effective distance of 10 micrometres in under 200 nanoseconds with an average fidelity of 99.5%.
More information here
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