Ion Trap Marks A Step Toward Practical Quantum Computing

B. C. Travaglione, Gerard J Milburn

Recently, several groups have investigated quantum analogues of random walk algorithms, both on a line and on a circle. It has been found that the quantum versions have markedly different features to the classical versions. Namely, the variance on the line, and the mixing time on the circle increase quadratically faster in the quantum versions as compared to the classical versions. Here, we propose a scheme to implement the quantum random walk on a line and on a circle in an ion trap quantum computer. With current ion trap technology, the number of steps that could be experimentally implemented will be relatively small. However, we show how the enhanced features of these walks could be observed experimentally. In the limit of strong decoherence, the quantum random walk tends to the classical random walk. By measuring the degree to which the walk remains ``quantum,'' this algorithm could serve as an important benchmarking protocol for ion trap quantum computers.

Mark S. Gulley, Richard Hughes, J.J. Gómez +11 more

Т. С. Аббасов, I. A. Stolyarov, Dmitry S. Chuchelov +5 more

Abstract We presented the first experimental realization of ion trapping in a microfabricated surface ion trap in the Russian Federation. We designed and modeled an asymmetrical surface ion trap, simulating the pseudopotential and confinement of a 174Yb+ ion. Based on this design, a planar trap was manufactured and successfully tested, demonstrating stable confinement of a single 174Yb+ ion and the formation of a linear ion chain. The results confirm the validity of the design and modeling, marking a key step toward scalable trapped‑ion platforms in Russia.

Joonho Bae

Martin Ringbauer

Grzegorz H. Kasprowicz

Ion trap quantum computers are complex optoelectronic systems that require several electronic subsystems orchestrated to sub-1ns precision, both low-noise and high speed. WUT developed a modular control system in EEM/DIOT form factor called SINARA (Standardised Instrumentation Architecture for Research Applications) [1]. SINARA became the de facto standard in atomic and Molecular laboratories worldwide; a few leading quantum computer manufacturers also use it. Its success, which can be attributed to the open-source, open-hardware licensing model, has significantly advanced the field of quantum computing by providing a reliable and adaptable control system. SINARA was primarily developed for lab applications but recently has been transformed into an industrial form factor (DIOT [5]) because many lab projects have turned into spin-offs and startups.The scaling of quantum computers creates several technological issues. Most topologies are enclosed in a vacuum and use cryogenic temperatures. Future quantum computer architectures need to implement electronic control systems capable of steering hundreds of thousands of electrodes with high precision and relatively high voltage of a few dozen V. Within the framework of the Quantera SIQCI [3] project, a collaborative effort aimed at advancing the field of quantum computing, we are building a demonstrator of such a scalable control system. An essential step of the design process is characterising a standard 180nm high voltage process at temperatures below 10 K. The next step is updating the process PDK and designing the test structures using updated models. This paper presents the requirements for such a control system, the first results of the measurements and the design methodology.Furthermore, this talk will unveil the first coherent operations results performed on ions trapped in the WUT labs using the SINARA system, marking a significant milestone in our system’s practical applications.