Friday, February 24, 2012

1111.1798 (Xia-Ji Liu et al.)

Probing Majorana fermions in spin-orbit coupled atomic Fermi gases    [PDF]

Xia-Ji Liu, Lei Jiang, Han Pu, Hui Hu
We examine theoretically the visualization of Majorana fermions in a
two-dimensional trapped ultracold atomic Fermi gas with spin-orbit coupling. By
increasing an external Zeeman field, the trapped gas transits from
non-topological to topological superfluid, via a mixed phase in which both
types of superfluids coexist. We show that the zero-energy Majorana fermion,
supported by the topological superfluid and localized at the vortex core, is
clearly visible through (i) the core density and (ii) the local density of
states, which are readily measurable in experiment. We present a realistic
estimate on experimental parameters for ultracold $^{40}$K atoms.
View original: http://arxiv.org/abs/1111.1798

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