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Massless Dirac-Weyl fermions in aT3optical lattice
Open accessAbstract
We propose an experimental setup for the observation of quasirelativistic massless fermions. It is based on a ${\mathcal{T}}_{3}$ optical lattice, realized by three pairs of counterpropagating lasers, filled with fermionic cold atoms. We show that in the long wavelength approximation the ${\mathcal{T}}_{3}$ Hamiltonian generalizes the Dirac-Weyl Hamiltonian for the honeycomb lattice, however, with a larger value of the pseudospin $S=1$. In addition to the Dirac cones, the spectrum includes a dispersionless branch of localized states producing a finite jump in the atomic density. Furthermore, implications for the Landau levels are discussed.
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Metadata
- Authors
- Bercioux, D., Urban, D. F., Grabert, H., & Häusler, W.
- Affiliations
- University of Freiburg (DE)
- Venue
- Physical Review A
- Publisher
- American Physical Society (APS)
- Published
- 2009-12-01
- Volume
- 80
- Issue
- 6
- ISSN
- 0556-2791 (ISSN-L)
- 1050-2947
- 1094-1622
- OpenAlex
- W1984654887
- Cited by
- 212
- References
- 29
- Citations by year
- 2026: 9 · 2025: 9 · 2024: 21 · 2023: 21 · 2022: 13 · 2021: 24 · 2020: 25 · 2019: 16 · 2018: 11 · 2017: 9 · 2016: 5 · 2015: 10 · 2014: 9 · 2013: 7 · 2012: 8
- FWCI
- 4.27
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Physical Review A (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- OPUS (Augsburg University) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Topological Materials and Phenomena
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Cold Atom Physics and Bose-Einstein Condensates
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Non-Hermitian Physics
- Keywords
- Dirac cones, honeycomb lattice, localized states, Landau levels, ultracold atoms
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