Fully integrated chip-based quantum computing

捕获的离子构成了近乎完美的量子位，具有无与伦比的量子逻辑性能。微制造的“芯片”陷阱是一种很有前途的途径，可以扩展到未来量子计算机所需的大量量子比特。我们先前使用芯片陷阱首次演示了具有高保真度（高于99.5%）的一整套基本量子位操作[Harty等人，PRL 2014和2016]，其中通过微波电子技术执行相干量子位控制。我们的第二代芯片陷阱系统在中等低温（10 K-50 K）下工作以降低噪声，具有必要的性能，可以实现99.9%以上保真度的逻辑门，速度比我们的第一代系统快得多。然而，光学控制（仍然需要用于量子比特状态准备和读出）仍然由体光学器件提供，严重限制了该技术的可扩展性。

Trapped ions constitute near-perfect qubits with unrivalled quantum logic performance. Microfabricated "chip" traps are a promising avenue for scaling up to the large numbers of qubits required for future quantum computers. We previously made the first demonstration of a complete set of elementary qubit operations with high fidelity (above 99.5%) using chip traps [Harty et al., PRL 2014 and 2016], where the coherent qubit control was by performed by microwave electronic techniques. Our second-generation chip trap system, which operates at moderate cryogenic temperatures (10K-50K) to reduce noise, has the necessary performance to achieve logic gates with greater than 99.9% fidelity, at significantly faster speeds than our first-generation system. However, the optical control (still needed for qubit state prep and readout) is still provided by bulk optics, severely limiting the scalability of the technology.