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Flat-Band Localization in Creutz Superradiance Lattices
Yanyan He1, Ruosong Mao1, Han Cai1
1Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, and Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou 310027, Zhejiang Province, China.
Physical Review Letters
|March 30, 2021
Summary
Researchers engineered flat bands in atomic systems using synthetic gauge fields. This allows control over light localization and offers a room-temperature platform for exploring novel topological materials.
Area of Science:
- Atomic physics
- Condensed matter physics
- Quantum optics
Background:
- Flat bands are crucial for diffraction-free photonics and fundamental many-body physics.
- Controlling atomic states in engineered lattices is key to exploring novel quantum phenomena.
Purpose of the Study:
- To engineer flat-band localization of collective atomic excitations.
- To investigate the role of tunable synthetic gauge fields in controlling flat bands.
- To establish a room-temperature platform for studying flat bands in atomic systems.
Main Methods:
- Utilized Creutz superradiance lattices with tunable synthetic gauge fields.
- Independently controlled magnitudes and phases of lattice hopping coefficients.
- Achieved selective excitation and control of flat-band localization.
Main Results:
- Demonstrated engineering of flat-band localization in atomic systems.
- Showcased independent tuning of lattice hopping for controlling flat-band properties and Aharonov-Bohm phases.
- Successfully achieved selective excitation and manipulation of the flat band.
Conclusions:
- The study provides a novel room-temperature platform for flat bands using atoms.
- The findings hold promise for exploring correlated topological materials.
- Tunable synthetic gauge fields offer precise control over flat-band localization.
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