Special Seminar Monday February 11, 10am. Jefferson 356 Engineering Trapped-Ion Systems for Large Scale Quantum Simulation G. Pagano1 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 E-mail: pagano@umd.edu<mailto:pagano@umd.edu> 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-body- localized dynamics [1]. I will also present our observation of a new type of out-of- equilibrium 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 post- quench dynamics [4] and the implementation of Quantum Approximate Optimization Algorithms (QAOA) [5]. References: [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)