Floquet Hamiltonian engineering of an isolated many-body spin system

Controlling interactions is the key element for the quantum engineering of many-body systems. Using time-periodic driving, a naturally given many-body Hamiltonian of a closed quantum system can be transformed into an effective target Hamiltonian that exhibits vastly different dynamics. We demonstrat...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2021-11, Vol.374 (6571), p.1149-1152
Main Authors: Geier, Sebastian, Thaicharoen, Nithiwadee, Hainaut, Clément, Franz, Titus, Salzinger, Andre, Tebben, Annika, Grimshandl, David, Zürn, Gerhard, Weidemüller, Matthias
Format: Article
Language:English
Subjects:
Engineering
Hamiltonian functions
Quantum theory
Rubidium
Rydberg states
Simulation
Spin dynamics
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Summary:Controlling interactions is the key element for the quantum engineering of many-body systems. Using time-periodic driving, a naturally given many-body Hamiltonian of a closed quantum system can be transformed into an effective target Hamiltonian that exhibits vastly different dynamics. We demonstrate such Floquet engineering with a system of spins represented by Rydberg states in an ultracold atomic gas. By applying a sequence of spin manipulations, we change the symmetry properties of the effective Heisenberg XYZ Hamiltonian. As a consequence, the relaxation behavior of the total spin is drastically modified. The observed dynamics can be qualitatively captured by a semiclassical simulation. Engineering a wide range of Hamiltonians opens vast opportunities for implementing quantum simulation of nonequilibrium dynamics in a single experimental setting.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.abd9547