Room-Temperature Implementation of the Quantum Streaming Algorithm in a Single Solid-State Spin Qubit

Great challenges are encountered when solving problems based on continuously generated data streams due to the online data input fashion and limited memory space. Quantum properties are helpful in dealing with stream data. In this work, we design and experimentally implement a quantum streaming algorithm (QSA) with various lengths of input data in a single-defect spin system in silicon carbide at room temperature. We explore the schemes with trusted advice on the output results during the algorithm execution. Quite contrary to the classical case, outdated advice is still useful in the quantum case, as revealed by a proper performance function. Our work demonstrates the advantage of the QSA, which would be useful for investigating complex online problems. The room-temperature solid-state spin platform based on such a technological material opens the door for scalable quantum-information processing.