Made with ultrahigh-resolution, two-photon polymerization (2PP) 3D printing, the millimeter-scale ion traps can confine calcium ions with frequencies, error rates and coherence competitive with the state-of-the-art and can be used to perform single- and two-qubit operations. 3D printing can allow us to move beyond these conventional traps into more highly integrated systems like our current processors." "With this increased design space, we can now think very differently on how to optimize and miniaturize our ion traps." Xia also sees it as an opportunity to show what high-resolution 3D printing can do for the field. More information: Shuqi Xu et al, 3D-printed micro ion trap technology for quantum information applications, Nature (2025).