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Tunable multiple layered Dirac cones in optical lattices | | Z. Lan
; A. Celi
; W. Lu
; P. Ohberg
; M. Lewenstein
; | | Date: |
5 Aug 2011 | | Abstract: | We show that multiple layered Dirac cones can emerge in the band structure of
properly addressed multi-component cold fermionic gases in optical lattices.
The layered Dirac cones contain multiple copies of the massless spin-1/2 Dirac
fermions at the same location in momentum space, whose different Fermi velocity
can be tuned at will. On-site microwave Raman transitions can further lead to
the mixing of the different Dirac species, resulting in a splitting of the
multiple layered cones into several single layered cones. 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 $Esim p^n $ for arbitrary integer n. | | Source: | arXiv, 1108.1326 | | Services: | Forum | Review | PDF | Favorites | |
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