Scaling Up Quantum Computers: RIKEN Scientists Connect Distant Silicon Qubits — The linking of two distant |
RIKEN researchers have connected two physically distant silicon spin qubits using a method called coherent spin shuttling, a major step toward large-scale quantum computing. This breakthrough overcomes the challenge of linking far-apart quantum dots, a critical hurdle in scaling quantum computers from hundreds to millions of qubits.
Many big IT players—including the likes of IBM, Google, and Microsoft—are racing to develop quantum computers, some of which have already demonstrated the ability to greatly outperform conventional computers for certain types of calculations. But one of the greatest challenges to developing commercially viable quantum computers is the ability to scale them up from a hundred or so qubits to millions of qubits.is silicon quantum dots that are a few tens of nanometers in diameter.
Now, Noiri and co-workers have realized a two-qubit logic gate between physically distant silicon spin qubits .
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