Controlling the Floquet state population and observing micromotion in a periodically driven two-body quantum system

Understand

Near-resonant periodic driving of quantum systems promises the implementation of a large variety of novel effective Hamiltonians.

• The challenge of Floquet engineering lies in the preparation and measurement of the desired quantum state.
• We address these aspects in a model system consisting of interacting fermions in a periodically driven array of double wells created by an optical lattice.
• The singlet and triplet fractions and the double occupancy of the Floquet states are measured, and their behavior as a function of the interaction strength is analyzed in the high- and low-frequency regimes.