European Conference on Trapped Ions (ECTI)

We’ve designed and built a high-pass optical bladetrap, with the ability to achieve NA=0.66 in two laser directions and NA=0.37 in the other two. This bladetrap has excellent performance: the vacuum can reach 7*10^-17 Torr at room temperature, and the Q value of helical can reach 280. Combined with optical and electronic scheme, we demonstrate a low-crosstalk optical double-side addressing scheme and implement MS gate based on symmetrically-configured acousto-optic deflectors (AODs). We employ two 0.4 NA objective lenses in both arms of the Raman laser and obtain a beam waist of 0.93±0.03 µm, resulting in a Rabi rate crosstalk as low as 6.32 × 10−4 when the neighboring ion separation is about 5.5 µm, and realize a 2-qubit MS Gate with fidelity>90%. These technologies combined together provides a promising platform for quantum computing, simulation and networking.