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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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Generalized Haldane models on laser-coupling optical lattices.

Wanli Liu1, Zhi Lin1,2, Z D Wang3

  • 1Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai, 200438, China.

Scientific Reports
|August 29, 2018
PubMed
Summary
This summary is machine-generated.

We introduce two novel generalized Haldane models on optical lattices. These models create topological nontrivial band structures supporting topological insulator and semimetal phases with high Chern numbers.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Optics
  • Materials Science

Background:

  • The Haldane model is foundational for understanding topological phases in condensed matter.
  • Optical lattices offer a controllable platform for simulating complex quantum phenomena.
  • Laser-assisted tunneling is a technique to engineer novel interactions in cold atom systems.

Purpose of the Study:

  • To propose two generalized Haldane models on laser-coupled optical lattices.
  • To investigate the realization of topological nontrivial band structures.
  • To explore topological insulator and semimetal phases with high Chern numbers.

Main Methods:

  • Developing generalized Haldane models using laser-assisted nearest neighbor tunnelings.
  • Generating artificial staggered magnetic flux.
  • Calculating Chern numbers and displaying phase diagrams.
  • Performing numerical calculations of energy spectra.

Main Results:

  • Successfully realized topological nontrivial band structures.
  • Identified topological insulator and semimetal phases with high Chern numbers.
  • Developed simple rules for computing Chern numbers.
  • Numerical results confirmed theoretical predictions.

Conclusions:

  • The proposed models are effective generalizations of the Haldane model.
  • These models provide new platforms for studying topological phases in optical lattices.
  • The findings contribute to the development of novel topological materials and devices.