Materials challenges for trapped-ion quantum computers

Trapped-ion quantum information processors store in atomic ions maintained position free space by electric fields. Quantum logic is enacted through manipulation of the ions’ internal and shared motional states using optical microwave signals. Although trapped show great promise for quantum-enhanced computation, sensing communication, materials research needed to design traps that allow improved performance means integration system components, including optics electronics ion-qubit control, while minimizing near-ubiquitous electric-field noise produced trap-electrode surfaces. In this Review, we consider requirements such integrated systems, with a focus on problems hinder current progress towards practical computation. We give suggestions how scientists trapped-ion technologists can work together develop materials-based noise-mitigation strategies enable next generation computers. qubits have potential but improvements are needed. This Review surveys opportunities improve qubits, from understanding surface science leads developing methods building ion electronics.