Next generation universal trapped-ion quantum computing system*

The first generation universal trapped ion-based quantum computer relies on individual addressing of each ion with a separate, controllable beam. In this way, it is possible to drive arbitrary gates between any pair of ions and achieve full connectivity. It performs quantum algorithms with high fidelity on 13 qubits, and high-fidelity quantum gates with up to 23 qubits.  

In this work we discuss progress of commissioning the second-generation trapped-ion universal quantum computer. Several design improvements were made, such as a capacity of 32 qubits, a next-generation micro-fabricated surface ion trap provided by Sandia National Laboratories, integration with the upgraded Raman systems for individual qubit addressing built in collaboration with L3Harris, and fully integrated CW laser system provided by AOSense. In this system we have achieved lower heating rate, which was one of the main limitations for scaling to higher number of qubits in the first-generation quantum computer.