A Compact Cryogenic Package Approach to Ion Trap Quantum Computing
| dc.contributor.advisor | Kim, Jungsang | |
| dc.contributor.author | Spivey, Robert Fulton | |
| dc.date.accessioned | 2022-09-21T13:55:03Z | |
| dc.date.available | 2022-09-22T08:17:14Z | |
| dc.date.issued | 2022 | |
| dc.department | Electrical and Computer Engineering | |
| dc.description.abstract | Ion traps are a leading candidate for scaling quantum computers. The component technologies can be difficult to integrate and manufacture. Experimental systems are also subject to mechanical drift creating a large maintenance overhead. A full system redesign with stability and scalability in mind is presented. The center of our approach is a compact cryogenic ion trap package (trap cryopackage). A surface trap is mounted to a modified ceramic pin grid array (CPGA) this is enclosed using a copper lid. The differentially pumped trap cryopackage has all necessary optical feedthroughs and an ion source (ablation target). The lid pressure is held at ultra-high vacuum (UHV) by cryogenic sorption pumping using carbon getter. We install this cryopackage into a commercial low-vibration closed-cycle cryostat which sits inside a custom monolithic enclosure. The system is tested and trapped ions are found to have common mode heating rate on the order of 10 quanta/s. The modular optical setup provides for a couterpropagating single qubit coherence time of 527 ms. We survey a population of FM two-qubit gates (gate times 120 μs - 450 μs) and find an average gate fidelity of 98\%. We study the gate survey with quantum Monte Carlo simulation and find that our two-qubit gate fidelity is limited by low frequency (30 Hz - 3 kHz) coherent electrical noise on our motional modes. | |
| dc.identifier.uri | ||
| dc.subject | Quantum physics | |
| dc.subject | Atomic physics | |
| dc.subject | Optics | |
| dc.subject | cryogenic | |
| dc.subject | Ion Trapping | |
| dc.subject | optomechanics | |
| dc.subject | Quantum computing | |
| dc.subject | quantum gates | |
| dc.subject | two-qubit gates | |
| dc.title | A Compact Cryogenic Package Approach to Ion Trap Quantum Computing | |
| dc.type | Dissertation | |
| duke.embargo.months | -0.06575342465753424 |
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