Interaction-induced doublons in a ring lattice with OAM map to effective SSH chains and Creutz ladders that support topologically protected edge states.
Particularly, the intercell hopping between ± modes contains a complex factor e−i2αϕ [59, 64], where the staggering angle ϕ can be tuned
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Topological bound states in a lattice of rings with nearest-neighbour interactions
Interaction-induced doublons in a ring lattice with OAM map to effective SSH chains and Creutz ladders that support topologically protected edge states.