Fractional charge excitations in fermionic ladders
B.N. Narozhny, S.T. Carr, and A.A. Nersesyan
TL;DR
This paper demonstrates that interacting spinless fermions on a two-leg ladder with a magnetic field exhibit long-range order and elementary excitations that are fractionalized, carrying half the electron charge, revealing novel quantum phenomena.
Contribution
It introduces a model showing fractional charge excitations in fermionic ladders with long-range order induced by magnetic fields, highlighting new quantum states.
Findings
Presence of long-range order: bond density wave or staggered flux phase.
Elementary excitations are $Z_2$ kinks with fractional charge.
Identification of fractionalized excitations in a fermionic ladder system.
Abstract
The system of interacting spinless fermions hopping on a two-leg ladder in the presence of an external magnetic field is shown to possess a long range order: the bond density wave or the staggered flux phase. In both cases the elementary excitations are kinks and carry one half the charge of an electron.
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