Fast, high-fidelity baseband reset of a latched state for readout of a quantum dot qubit

American Physical Society (2026)

Scientists have found a way to make a quantum-dot qubit much faster to reuse after it has been measured. The qubit is read out using a “latched” state, which is helpful because it creates a stronger, easier-to-detect signal, but it also tends to get the qubit stuck for too long afterward. The scientist show that a simple electrical pulse can quickly push the system out of that stuck state and return it to its starting condition with very high reliability. This reset works more than 50 times faster than just waiting for the system to relax on its own, which is important because future quantum computers will need to measure and reset qubits over and over again very quickly, especially for quantum error correction.

The paper authors are Piotr Marciniec, M.A. Wolfe, Tyler Kovach, J. Reily, Sanghyeok Park, Jared Benson, Mark Friesen, Benjamin D. Woods, and M.A. Eriksson, from the University of Wisconsin-Madison; and Matthew J. Curry, Nathaniel Bishop, and J. Corrigan, from Intel (Hillsboro, Ore.).