Long-distance interaction of gate-defined quantum dots under Floquet driving
Phys. Rev. Applied 24, 054029 – Published 10 November, 2025
DOI: https://doi.org/10.1103/zbcs-jdq2
Abstract
Cavity-mediated interaction between gate-defined quantum dots (QDs) has emerged as a promising platform to achieve long-distance spin-spin coupling. However, the realization of on-chip quantum networks and scalable quantum computing requires robust and high-fidelity remote quantum operations. In this work, we use Floquet modulation of gate voltages to fine-tune remote couplings between QDs. We show that the long-distance controlled-iswap gate can be well implemented by choosing suitable values of the frequency, amplitude, and phase of Floquet driving. Moreover, we propose a protocol to achieve high-fidelity quantum state transfer using phase modulation and the stimulated Raman adiabatic passage, which exhibits robustness to dephasing noises. Our work provides efficient and feasible solutions to control remote couplings between gate-defined QDs, and will greatly promote related theoretical studies and experimental implementations.
