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- Title
Simulating Weyl points and nodal loops in an optical superlattice.
- Authors
Zhang, Dan-Wei
- Abstract
We propose a scheme to simulate Weyl points and nodal loops with ultracold atoms in an optical lattice that is subjected to realizable synthetic magnetic field and synthetic dimension. We show that a Hofstadter-like Hamiltonian with a cyclically parameterized on-site energy term can be realized in a tunable two-dimensional optical superlattice, based on the laser-assisted atomic tunneling method. This model effectively describes a three-dimensional periodic lattice system under magnetic fluxes, where a synthetic dimension is encoded by a cyclical phase of the optical lattice potential. For different atomic hopping configurations, the single-particle bands are demonstrated to, respectively, exhibit Weyl points and nodal loops in the extended three-dimensional Brillouin zone. Furthermore, we illustrate that the mimicked Weyl points and nodal loops can be experimentally detected by measuring the atomic transfer fraction in Bloch-Zener oscillations.
- Subjects
SUPERLATTICES; WEYL space; MAGNETIC fields; BRILLOUIN zones; QUANTUM tunneling
- Publication
Quantum Information Processing, 2016, Vol 15, Issue 11, p4477
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-016-1428-3