Publications

Results 26–50 of 94

Search results

Jump to search filters

Engineering the Quantum Scientific Computing Open User Testbed

IEEE Transactions on Quantum Engineering

Clark, Susan M.; Lobser, Daniel L.; Revelle, Melissa R.; Yale, Christopher G.; Bossert, David B.; Grinevich, Ashlyn D.; Chow, Matthew N.; Hogle, Craig W.; Ivory, Megan K.; Pehr, Jessica; Salzbrenner, Bradley S.; Stick, Daniel L.; Sweatt, W.C.; Wilson, Joshua M.; Winrow, Edward G.; Maunz, Peter

The Quantum Scientific Computing Open User Testbed (QSCOUT) at Sandia National Laboratories is a trapped-ion qubit system designed to evaluate the potential of near-term quantum hardware in scientific computing applications for the U.S. Department of Energy and its Advanced Scientific Computing Research program. Similar to commercially available platforms, it offers quantum hardware that researchers can use to perform quantum algorithms, investigate noise properties unique to quantum systems, and test novel ideas that will be useful for larger and more powerful systems in the future. However, unlike most other quantum computing testbeds, the QSCOUT allows both quantum circuit and low-level pulse control access to study new modes of programming and optimization. The purpose of this article is to provide users and the general community with details of the QSCOUT hardware and its interface, enabling them to take maximum advantage of its capabilities.

More Details
TYPE Journal Article YEAR 2021
DOIOSTIScopus

Recipe for coating ceramic blades for ion trapping

Stick, Daniel L.; Casias, Adrian L.

The first batches of ion traps patterned and coated were processed per the standard 3-step clean, air fire, and metallization processes. The third or fourth lot using this process resulted in poorly adhering metallization. Up until this point, the standard process was used to metallize and pattern ceramic ion traps without fail. At about the 4th batch of parts something changed. After the 5th batch, the ceramic ion traps received generally came with some unknown contamination that does not come off in a standard 3-step clean (Lenium Vapor Degreaser, Acetone, IPA) and air fire (860C for 1 hour) for which this process removes the vast majority of all contamination for most ceramic metallization. This is highly unusual. Using HF + Boiling H2O2 is extreme for cleaning the ceramic ion traps. The contamination was never identified and is stubborn to effectively clean. Standard as-fired ceramic should be very easy to clean as if s fired at temperatures greater than 1400°C and not much in terms of contamination should exist at these temperatures, so there must be an intermediate step/process which is imparting this contamination. It is likely a polishing compound or previous polishing contaminant, but also not easily visually distinguishable until after metallization. The halo marks observed on parts might be fingerprints (less likely) or potential polishing marks (more likely) as metallization typically doesn't cover/hide any damage or contamination, but rather quite clearly the opposite, it accentuates it. Blotchy appearances in the metallization usually indicated an adhesion issue. As a result of the fragility of the parts (yield loss due to handling) and difficulty in identifying the contamination during cleaning, we have taken a conservative approach of HF + H2O2 cleaning for all batches after the contamination and adhesion issues were identified.

More Details
TYPE Other Report YEAR 2020
DOIOSTI

TICTOC: Compact Atomic Clock with Integrated Photonics

Ivory, Megan K.; Gehl, M.; Setzer, William J.; McGuinness, Hayden J.; Haltli, Raymond A.; Blain, Matthew G.; Stick, Daniel L.; Parazzoli, Lambert P.

Atomic clocks are precision timekeeping devices that form the basis for modern communication and navigation. While many atomic clocks are room-sized systems requiring bulky free space optics and detectors, the Trapped-lon Clock using Technology-On-Chip (TICTOC) project integrates these components into Sandia's existing surface trap technology via waveguides for beam delivery and avalanche photodiodes for light detection. Taking advantage of a multi-ensemble clock interrogation approach, we expect to achieve record time stability (< 1 ns error per year) in a compact (< /1 2 L) clock. Here, we present progress on the development of the integrated devices and recent trapped ion demonstrations.

More Details
TYPE Conference Poster YEAR 2019
OSTI
Results 26–50 of 94
Results 26–50 of 94