Large-scale quantum processing: On the same wavelength
Scientists have realized a hardware scheme that enables the large-scale integration of quantum information platforms. The processing of information by qubits traditionally requires that each processing unit is individually controlled by a characteristic microwave control frequency. This leads to a complex parallel device architecture, which has hampered the large-scale integration of qubits. A more scalable alternative is to use one common frequency to address and control multiple qubits while using fewer microwave control devices. Leonardo DiCarlo and colleagues at Delft University of Technology and the Netherlands Organisation for Applied Scientific Research have developed a scheme that is able to independently control multiple qubits using a common frequency and a selective broadcasting device. This approach allows a larger number of qubits to be integrated on a single platform.