Joint ICTP/SISSA Statistical Physics Seminar: From Quantum Algorithms to Out-of-Equilibrium Phenomena in Interacting Trapped-Ion Spin Chains
Starts 17 Dec 2019 11:00
Ends 17 Dec 2019 12:00
Central European Time
Leonardo Building - Luigi Stasi Seminar Room
This is a TQT (Theory of Quantum Technologies) Event.
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 out-of-equilibrium strongly correlated many-body quantum systems. In particular I will present our observation of a new type of out-of-equilibrium dynamical phase transition in a spin system with over 50 spins . Moreover, I will show our latest efforts towards scaling up the trapped-ion quantum simulator  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 use up to 40 trapped-ion qubits to observe real-time domain wall confinement in an interacting spin chain [3, 4] and to implement a Quantum Approximate Optimization Algorithm (QAOA) to approximate the ground state energy of a transverse field Ising model .
 J. Zhang, G. Pagano, et al., Nature, 551, 601 (2017)
 G. Pagano et al., Quantum Sci. Technol., 4, 014004 (2019)
 F. Liu, et al., Phys. Rev. Lett. 122, 150601 (2018)
 W. L. Tan, P. Becker, et al. (in preparation)
 G. Pagano, et al., arXiv 1906.02700 (2019)
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