Speaker
Description
In the context of a universal quantum processor, trapped ions are a promising physical platform, uniting desirable properties like all-to-all interconnectivity of qubits, long coherence times, and high gate fidelities.
We will report on the electrical design work for a microfabricated X-junction surface trap which allows the control of up to 16 $^9$Be$^+$ hyperfine qubits. It features independent storage, detection, and interaction zones. The internal and motional states are manipulated by a 1 GHz oscillating magnetic field gradient which is generated by a trap-integrated microwave electrode. We are preparing to implement sympathetic cooling based on the coupling of specific motional modes in a symmetric dual-species ion crystal by superimposing an oscillating electrical field on the trap DC potential.
Therefore, the new chip requires an increased number of DC and high frequency signals. In order to build a scalable system, we use flexible PCBs as DC cables. To decrease the heat load on the trap, we explore the possibility of using a commercial ceramic PCB as an interposer, and design thermalisation structures for all signals.
| Academic level | PhD student |
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