A team of researchers at CEA-Leti in France and the University of Copenhagen’s Niels Bohr Institute have made 2D arrays on a 300mm CMOS wafer to boost quantum computers.
The device has a 2×2 quantum dot lattice on a commercial foundry service, and the array is designed to reduce errors in quantum computer architectures by improving upon the error correction systems.
To improve quantum error correction routines, researchers can extend the processors of the machines. Through the use of quantum error correction, future quantum computers can become fault tolerant when individual qubits fail mid-computation.
Earlier in 2015, some researchers in Grenoble were ablew to make the first spin qubit, only it was not based on electrons, but holes. The current quantum dots are three times more powerful.
The first order of business is to control the errors that occur when quantum computers are performing tasks. However, current qubits still have higher error rates. With the 2D quantum dot array, the qubits can check on each other when enough are combined.
The NBI research has shown that controlling single electrons is now a reality, as well as controlling them without a magnetic field present. The next step is to look for spins, or spin signatures, when there is a magnetic field present.
These results will be important when single and two-qubit gates are implemented between the single qubits in the array. A complete set of quantum gates is theoretically capable of universal quantum computation as well.
See the Original Research Paper