Erlangen 2018 – scientific programme
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SYPS: PhD-Symposium
SYPS 1: PhD-Symposium: Floquet Physics - how time-periodic systems can make a difference
SYPS 1.4: Invited Talk
Monday, March 5, 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 Monroe1 — 1Joint 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.