(Photonics.com) A research team led by the RIKEN Center for Emergent Matter Science (CEMS) has constructed a hybrid device for quantum computing, made from two different types of qubits, each with distinct advantages.
For the study, the scientists implemented a controlled-phase (CPHASE) gate between an LD qubit and an ST qubit in a quantum dot array. This allowed spin states to be entangled between the qubits in a time fast enough to maintain the coherence, allowing the state of the single-spin qubit to be read out by the fast singlet-triplet qubit measurement.
According to researcher Akito Noiri, “With this study we have demonstrated that different types of quantum dots can be combined on a single device to overcome their respective limitations. This offers important insights that can contribute to the scalability of quantum computers.”
System Using Two Different Types of Qubits Tackles Scalability Issues in Quantum Computing
