Using Horse Ridge, a control chip for quantum computers, researchers demonstrated frequency multiplexing on two qubits using the same wire and reported 99.7% fidelity in randomized benchmarking.
Back in 2019, Intel debuted its first-generation control chip for scalable quantum computers. Dubbed Horse Ridge, the control chip is a step towards scaling up quantum computers for practical use cases by reducing the complexity of the circuitry required to manage cryogenic qubits and their controlling hardware. So far, Intel had posited the potential of Horse Ridge based on theoretical metrics. However, that changes now. In a paper published a couple of days back in Nature Machine Intelligence, Intel in collaboration with QuTech, reported key findings from a practical experiment utilizing Horse Ridge. In an industry first, Intel and QuTech successfully carried out frequency multiplexing by using the same cable to control two qubits.
