基于机械谐振器的量子计算平台

We realized a mechanical resonator–based quantum computing (MRQC) platform using an ℏBAR device, a circuit quantum acoustodynamics (cQAD) system composed of a superconducting transmon qubit coupled to an HBAR (Fig. 1A). The architecture leverages the fast, high-fidelity single-qubit control and readout of the superconducting transmon qubit together with the multimode structure and long coherence time of the phonon modes in the HBAR. We demonstrate the implementation of a set of both single- and two-qubit gates on states stored in the mechanical modes, sufficient for universal quantum computing. In particular, we introduced a scheme for implementing controlled arbitrary-phase (Cϕ) gates through off-resonant qubit-resonator interactions and used it to realize commonly used quantum algorithms, such as the quantum Fourier transform (QFT) (22). …