Inside Quantum Technology

Ten-Qubit Solid-State Spin Register with Remarkable Quantum Memory

( The elementary building blocks of quantum information systems are known as qubits. For quantum technology to become a tangible reality, researchers will need to identify strategies to control many qubits with very high precision rates.
In order to reach the computational power necessary to complete complex tasks, quantum registers should be significantly larger than those realized so far. However, controlling individual spins within complex and strongly interacting quantum systems has so far proved to be very challenging.
Recently, a team of researchers at TU Delft and Element Six has successfully demonstrated a fully controllable ten-qubit spin register with a quantum memory up to one minute. Their findings could pave the way for the development of larger and yet controllable quantum registers, ultimately opening up new exciting possibilities for quantum computing.
“The main objective of our study was to realize a precisely controlled system of a large amount of qubits using the spins of atoms embedded in a diamond,” Tim Taminiau, one of the researchers who carried out the study, explained. These spins are promising quantum bits for quantum computation and quantum networks, but previous results were limited to just a few qubits.The system demonstrated by Taminiau and his colleagues could be a key building block for large quantum networks in which multiple NV centers, each providing several qubits, are connected together optically.

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