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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
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Exotic topological density waves in cold atomic Rydberg-dressed fermions.
1Department of Physics, Condensed Matter Theory Center and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742-4111, USA.
Nature Communications
|May 15, 2015
Summary
Researchers explored Rydberg-dressed atomic fermions in optical lattices, discovering exotic mixed topological density wave phases. These phases exhibit novel quantum phenomena and richer topological properties in gapless fermionic states.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Condensed Matter Physics
- Quantum Simulation
Background:
- Ultracold atomic and molecular gases offer versatile control over quantum correlations and many-body phases.
- Rydberg atomic gases enable exquisite control over non-local interactions, creating novel quantum phases beyond solid-state analogues.
Purpose of the Study:
- To investigate Rydberg-dressed atomic fermions in a 3D optical lattice.
- To predict and characterize novel exotic mixed topological density wave phases.
Main Methods:
- Utilizing Rydberg-dressed atomic fermions in a three-dimensional optical lattice.
- Varying the spatial range of non-local interactions to explore phase transitions.
Main Results:
- Prediction of unprecedented exotic mixed topological density wave phases.
- Observation of chiral density waves with spontaneous time-reversal symmetry breaking.
- Identification of quasiparticles forming 3D quantum Hall and Weyl semimetal states.
- Discovery of density waves with mixed topologies beyond current classification.
Conclusions:
- Gapless fermionic states possess richer topological properties than previously understood.
- Rydberg-dressed systems provide a platform for exploring novel topological phases and quantum phenomena.
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