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New breakthrough technology enables real-time control of quantum qubits, optimizing stability and performance

Published on Wed Dec 31 1969 by Dustin Van Tate Testa

A new study published on the preprint server arXiv has demonstrated a real-time control protocol for a two-electron singlet-triplet qubit with fluctuating Hamiltonian parameters. The researchers utilized single-shot readout classification and dynamic waveform generation, along with a field-programmable gate array (FPGA), to estimate and control the fluctuating parameters in real time. This breakthrough technology enables controlled spin rotations without the need for micromagnets or nuclear polarization protocols. The study also showed that adjusting the detuning of the qubit based on the estimation of the exchange interaction between the two electrons resulted in improved coherence of Hadamard rotations. This research highlights the critical role of feedback in enhancing the performance and stability of quantum devices affected by environmental noise. The findings have significant implications for the development of quantum technology applications.

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