Erlangen 2018 – wissenschaftliches Programm

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SYPS: PhD-Symposium

SYPS 1: PhD-Symposium: Floquet Physics - how time-periodic systems can make a difference

SYPS 1.4: Hauptvortrag

Montag, 5. März 2018, 15:30–16:00, RW HS

Floquet Discrete Time Crystals in a Trapped-Ion Quantum Simulator — •Guido Pagano1, Jiehang Zhang1, Paul Hess1, Antonis Kyprianidis1, Patrick Becker1, Jacob Smith1, Aaron Lee1, Norman Yao2, Tobias Grass1, Alessio Celi3, Maciej Lewenstein3, and Christopher Monroe11Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742 — 2Department of Physics, University of California Berkeley, Berkeley, CA 94720, USA — 3ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Spain

Linear arrays of trapped and laser cooled atomic ions (171Yb+) are a versatile platform for studying strongly correlated many-body quantum systems with long range interactions. By off-resonantly driving motional normal modes with spin-dependent optical dipole forces, we generate tunable long-range spin-spin interactions, which are largely insensitive to the number of ions in the trap. We achieve a higher degree of control with a tightly-focused laser beam imparting a unique light shift on each ion, which we use for state initialization or to introduce controlled disorder into the system. Using these techniques in a Floquet setting allows us to observe time-crystalline phases, where the spin system exhibits persistent time-correlations either under Many-body-localized dynamics or in a prethermal regime. Moreover Floquet engineering in trapped-ion simulators can be also used to study topological systems by realizing complex-valued spin-spin interactions.

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