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Transport in Floquet-Bloch Bands
C J Fujiwara1, Kevin Singh1, Zachary A Geiger1
1University of California and California Institute for Quantum Emulation, Santa Barbara, California 93105, USA.
Physical Review Letters
|April 24, 2019
Summary
We demonstrate tunable long-range transport and direct imaging of Floquet-Bloch bands in optical lattices. This work enables cold atom emulation of ultrafast electronic dynamics.
Area of Science:
- Quantum physics
- Atomic physics
- Condensed matter physics
Background:
- Floquet engineering allows dynamic control of quantum systems.
- Optical lattices provide a platform for simulating condensed matter phenomena.
Purpose of the Study:
- To engineer Floquet band structures for long-range transport.
- To directly image Floquet-Bloch bands.
- To enable quantum emulation of electronic dynamics.
Main Methods:
- Amplitude modulation of an optical lattice.
- Observation of Bose condensate transport.
- Transport dynamics to image band structure.
Main Results:
- Achieved tunable, rapid, long-range, high-fidelity transport.
- Demonstrated control over Wannier-Stark localization.
- Successfully imaged Floquet-Bloch band structure via transport dynamics.
Conclusions:
- Dynamical Floquet-Bloch band transport maps to quasistatic effective bands.
- Opens new avenues for cold atom quantum simulation of ultrafast electronic dynamics.
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