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CAMP: Engineering Trapped-Ion Systems for Large Scale Quantum Simulation

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Guido Pagano, University of Maryland
04 February 2019 from 3:30 PM to 4:30 PM
117 Osmond
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1Joint Quantum Institute and Joint Center for Quantum Information and Computer
Science, University of Maryland Department of Physics and National Institute of
Standards and Technology, College Park, MD 20742
Laser cooled trapped ions offer unprecedented control over both internal and
external degrees of freedom at the single-particle level. They are considered among
the foremost candidates for realizing quantum simulation and computation platforms
that can outperform classical computers at specific tasks. In this talk I will show how
linear arrays of trapped 171Yb+ ions can be used as a versatile platform for studying
quantum dynamics of strongly correlated many-body quantum systems.
In particular I will describe how to realize time-crystalline phases in a Floquet setting,
where the spin system exhibits persistent time-correlations under Many-bodylocalized
dynamics [1]. I will also present our observation of a new type of out-ofequilibrium
dynamical phase transition in a spin system with over 50 spins [2].
Moreover I will show our latest efforts towards scaling up the trapped-ion quantum
simulator [3] using a cryo-pumped vacuum chamber where we can trap more than
100 ions indefinitely. The reliable production and lifetime of large linear ion chains
enabled us to investigate quasi-particle excitations showing confinement in the
quench dynamics [4] and the implementation of Quantum Approximate Optimization
Algorithms (QAOA) with up to 40 spins [5].
[1] J. Zhang et al., Nature, 543, 217 (2017)
[2] J. Zhang, G. Pagano, et al., Nature, 551, 601 (2017)
[3] G. Pagano et al., Quantum Sci. Technol., 4, 014004 (2019)
[4] F. Liu, et al., arXiv 1810.02365 (2018)
[5] G.Pagano, et al., (in preparation 2019)