Tunable multiple layered Dirac cones in optical lattices

Abstract

We show that multiple layered Dirac cones can emerge in the band structure of properly addressed multicomponent cold fermionic gases in optical lattices. The layered Dirac cones contain multiple copies of massless spin-1/2 Dirac fermions at the {\it same}location in momentum space, whose different Fermi velocity can be tuned at will. On-site microwave Raman transitions can further be used to mix the different Dirac species, resulting in either splitting of or preserving the Dirac point (depending on the symmetry of the on-site term). The tunability of the multiple layered Dirac cones allows to simulate a number of fundamental phenomena in modern physics, such as neutrino oscillations and exotic particle dispersions with $E\sim p^N$ for arbitrary integer $N$.

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Cited by in corpus (19)

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• Quantum Simulation of the Abelian-Higgs Lattice Gauge Theory with Ultracold Atoms
• Quantum Walks as simulators of neutrino oscillations in vacuum and matter
• Dynamics of electric transport in interacting Weyl semimetals
• Conetronics in 2D Metal-Organic Frameworks: Double Dirac Cones, Magnetic Half Dirac Cones and Quantum Anomalous Hall Effect
• Unruh effect for interacting particles with ultracold atoms
• From Birefringent Electrons to a Marginal or Non-Fermi Liquid of Relativistic Spin-1/2 Fermions: An Emergent Superuniversality
• Robust Marginal Fermi Liquid In Birefringent Semimetals
• Asymmetric spatial structure of zero modes for birefringent Dirac fermions
• Different models of gravitating Dirac fermions in optical lattices
• Instabilities of a birefringent semi-metal
• Quantum phase transitions of multi-species Dirac fermions
• Transport properties in non-Fermi liquid phases of nodal-point semimetals
• Relativistic non-Fermi liquid from interacting birefringent fermions: A robust superuniversality
• Simulation of two-flavors symmetry-locking phases in ultracold fermionic mixtures
• Yukawa-Lorentz symmetry of interacting non-Hermitian birefringent Dirac fermions
• Experimental realization of a SU(3) color-orbit coupling in an ultracold gas
• Synthesis of Majorana mass terms in low-energy quantum systems
• Superpositions in Atomic Quantum Rings