The Realization and Dectection of Weyl Semimetals and Chiral Anomaly in Cold Atomic Systems
arXiv:1501.02348 · doi:10.1103/PhysRevA.94.013606
Abstract
In this work, we describe a method to realize 3D Weyl semimetal by coupling multilayers of honeycomb optical lattice in the presence of a pair of Raman lasers. The Raman lasers render each isolated honeycomb layer a Chern insulator. With finite interlayer coupling, the bulk gap of the system closes at certain out-of-plane momenta due to Raman assisted tunnelling and result in the Weyl semimetal phase. Using experimentally relevant parameters, we show that both one and two pairs of Weyl points can be realized by tuning the interlayer coupling strength. We suggest that Landau-Zener tunnelling can be used to detect Weyl points and show that the transition probability increases dramatically when Weyl point emerges. The realization of chiral anomaly by using a magnetic field gradient is also discussed.
6 pages, 5 figures. Comments are welcome
References in corpus (21)
- Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
- Experimental discovery of Weyl semimetal TaAs
- Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
- Measuring the Chern number of Hofstadter bands with ultracold bosonic atoms
- Topological response in Weyl semimetals and the chiral anomaly
- Observation of chiral edge states with neutral fermions in synthetic Hall ribbons
- Visualizing edge states with an atomic Bose gas in the quantum Hall regime
- Tunable gauge potential for neutral and spinless particles in driven lattices
- Non-Abelian gauge fields and topological insulators in shaken optical lattices
- Engineering Time-Reversal Invariant Topological Insulators With Ultra-Cold Atoms
- Realistic Time-Reversal Invariant Topological Insulators With Neutral Atoms
- Chiral anomaly, Charge Density Waves, and Axion Strings from Weyl Semimetals
- Observation of Quantized Conductance in Neutral Matter
- Weyl points in three-dimensional optical lattices: synthetic magnetic monopoles in momentum space
- Quantum transport in ultracold atoms
- Wilson Fermions and Axion Electrodynamics in Optical Lattices
- Periodically-driven quantum matter: the case of resonant modulations
- Floquet Edge States with Ultracold Atoms
- Measuring topology in a laser-coupled honeycomb lattice: From Chern insulators to topological semi-metals
- Direct Probe of Topological Order for Cold Atoms
- Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas
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- Type-II Weyl Points in Three-Dimensional Cold Atom Optical Lattices
- Ideal Weyl semimetal with 3D spin-orbit coupled ultracold quantum gas
- Double Weyl points and Fermi arcs of topological semimetals in non-Abelian gauge potentials
- A Higher-Order Topological Insulator Phase in a Modulated Haldane Model
- Topological Gapless Matters in Three-dimensional Ultracold Atomic Gases
- Geometrically protected triple-point crossings in an optical lattice
- Dynamics of Weyl quasiparticles emerged in an optical lattice
- Exploring topological double-Weyl semimetals with cold atoms in optical lattices
- Weyl points and topological nodal superfluids in a face-centered cubic optical lattice
- Hysteresis from nonlinear dynamics of Majorana modes in topological Josephson junctions
- Chern numbers and chiral anomalies in Weyl butterflies
- Chiral magnetic effect in three-dimensional optical lattices
- PT invariant Weyl semimetals in gauge symmetric systems
- Generalized Hofstadter model on a cubic optical lattice: From nodal bands to the three-dimensional quantum Hall effect
- Topological metal bands with double-triple-point fermions in optical lattices
- Realising Type II Weyl Points in an Optical Lattice
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- A Scaling Behavior of Bloch Oscillation in Weyl Semimetals
- Emulating topological currents arising from a dipolar parity anomaly in two-dimensional optical lattices
- Floquet chiral hinge modes and their interplay with Weyl physics in a three-dimensional lattice
- Fate of Weyl semimetals in the presence of incommensurate potentials
- From Nodal Ring Topological Superfluids to Spiral Majorana Modes in Cold Atomic Systems
- Weyl orbits without an external magnetic field
- Scheme to Equilibrate the Quantized Hall Response of Topological Systems from Coherent Dynamics
- Transition from nodal loop to nodal chain phase in a periodically modulated optical lattice
- Generating Weyl semimetals from alkali metals
- Dynamical detection of mean-field topological phases in an interacting Chern insulator
- Robust Weyl points in a 1D superlattice with transverse spin-orbit coupling
- Bosonic Weyl excitations induced by -orbital interactions in a cubic optical lattice