Methods for detecting charge fractionalization and winding numbers in an interacting fermionic ladder
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- Mazza_2015_New_J._Phys._17_105001
Final published version, 1.52 MB, PDF document
We consider a spin-1/2 fermionic ladder with spin-orbit coupling
and a perpendicular magnetic field, which shares important similarities
with topological superconducting wires. We fully characterize the
symmetry-protected topological phase of this ladder through the
identification of fractionalized edge modes and non-trivial spin winding
numbers. We propose an experimental scheme to engineer such a ladder
system with cold atoms in optical lattices, and we present two protocols
that can be used to extract the topological signatures from density and
momentum-distribution measurements. We then consider the presence of
interactions and discuss the effects of a contact on-site repulsion on
the topological phase. We find that such interactions could enhance the
extension of the topological phase in certain parameters regimes.
Original language | English |
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Journal | New Journal of Physics |
Volume | 17 |
Issue number | 10 |
Pages (from-to) | 105001 |
ISSN | 1367-2630 |
DOIs | |
Publication status | Published - 1 Oct 2015 |
Externally published | Yes |
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