Majorana edge states in two atomic wires coupled by pair-hopping

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Christina V. Kraus, Marcello Dalmonte, Mikhail A. Baranov, Andreas M. Laeuchli, P. Zoller



We present evidence for the existence of Majorana edge states in a number conserving theory describing a system of spinless fermions on two wires that are coupled by a pair hopping. Our analysis is based on the combination of a qualitative low energy approach and numerical techniques using the Density Matrix Renormalization Group. We also discuss an experimental realization of pair-hopping interactions in cold atom gases confined in optical lattices, and its possible alternative applications to quantum simulation.