requires its own addressing line and dedicated control electronics. This is highly unpractical and in stark contrast with today's computer technology, where billions of transistors are operated with a couple of thousand lines.Researchers at QuTech—a collaboration between the TU Delft and TNO—have developed a similar method for addressing.
Any point on a chessboard can be defined and addressed by using a specific combination of a letter and a number. Their approach takes the state-of-the-art to the next level and enables the operation of a 16 quantum dot system in a 4×4 array. First author Francesco Borsoi explains,"This new way of addressing quantum dots is advantageous for scaling up to many qubits. If a single qubit is controlled and read out using a single wire, millions of qubits will require millions of control lines. This approach does not scale very well."
"However, if qubits can be controlled using our chessboard-like system, millions of qubits could be addressed using 'only' thousands of lines, corresponding to a ratio very similar to those in computer chips. This reduction in lines gives prospects to scale the number of qubits and represents a breakthrough for quantum computers, that eventually will require millions of qubits.
, as the interaction of quantum dots is based on the principles of quantum mechanics. It turns out that quantum dot systems may be highly effective for quantum simulation.
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