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Browsing by Author "Pappas, David P."

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    Building a Quantum Engineering Undergraduate Program
    Asfaw, Abraham; Blais, Alexandre; Brown, Kenneth R.; Candelaria, Jonathan; Cantwell, Christopher; Carr, Lincoln D.; Combes, Joshua; Debroy, Dripto M.; Donohue, John M.; Economou, Sophia E.; Edwards, Emily; Fox, Michael F. J.; Girvin, Steven M.; Ho, Alan; Hurst, Hilary M.; Jacob, Zubin; Johnson, Blake R.; Johnston-Halperin, Ezekiel; Joynt, Robert; Kapit, Eliot; Klein-Seetharaman, Judith; Laforest, Martin; Lewandowski, H. J.; Lynn, Theresa W.; McRae, Corey Rae H.; Merzbacher, Celia; Michalakis, Spyridon; Narang, Prineha; Oliver, William D.; Palsberg, Jens; Pappas, David P.; Raymer, Michael G.; Reilly, David J.; Saffman, Mark; Searles, Thomas A.; Shapiro, Jeffrey H.; Singh, Chandralekha (IEEE, 2022-05)
    Contribution: A roadmap is provided for building a quantum engineering education program to satisfy U.S. national and international workforce needs. Background: The rapidly growing quantum information science and engineering (QISE) industry will require both quantum-aware and quantum-proficient engineers at the bachelor's level. Research Question: What is the best way to provide a flexible framework that can be tailored for the full academic ecosystem? Methodology: A workshop of 480 QISE researchers from across academia, government, industry, and national laboratories was convened to draw on best practices; representative authors developed this roadmap. Findings: 1) For quantum-aware engineers, design of a first quantum engineering course, accessible to all STEM students, is described; 2) for the education and training of quantum-proficient engineers, both a quantum engineering minor accessible to all STEM majors, and a quantum track directly integrated into individual engineering majors are detailed, requiring only three to four newly developed courses complementing existing STEM classes; 3) a conceptual QISE course for implementation at any postsecondary institution, including community colleges and military schools, is delineated; 4) QISE presents extraordinary opportunities to work toward rectifying issues of inclusivity and equity that continue to be pervasive within engineering. A plan to do so is presented, as well as how quantum engineering education offers an excellent set of education research opportunities; and 5) a hands-on training plan on quantum hardware is outlined, a key component of any quantum engineering program, with a variety of technologies, including optics, atoms and ions, cryogenic and solid-state technologies, nanofabrication, and control and readout electronics.
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    Gate-free state preparation for fast variational quantum eigensolver simulations
    Meitei, Oinam Romesh; Gard, Bryan T.; Barron, George S.; Pappas, David P.; Economou, Sophia E.; Barnes, Edwin Fleming; Mayhall, Nicholas J. (Springer Nature, 2021-10-27)
    The variational quantum eigensolver is currently the flagship algorithm for solving electronic structure problems on near-term quantum computers. The algorithm involves implementing a sequence of parameterized gates on quantum hardware to generate a target quantum state, and then measuring the molecular energy. Due to finite coherence times and gate errors, the number of gates that can be implemented remains limited. In this work, we propose an alternative algorithm where device-level pulse shapes are variationally optimized for the state preparation rather than using an abstract-level quantum circuit. In doing so, the coherence time required for the state preparation is drastically reduced. We numerically demonstrate this by directly optimizing pulse shapes which accurately model the dissociation of H2 and HeH+, and we compute the ground state energy for LiH with four transmons where we see reductions in state preparation times of roughly three orders of magnitude compared to gate-based strategies.