Emergent bosons in the fermionic two-leg flux ladder
arXiv:1908.02495 · doi:10.1103/PhysRevB.100.245149
Abstract
We study the emergence of bosonic pairs in a system of two coupled one-dimensional fermionic chains subject to a gauge flux (two-leg flux ladder), with both attractive and repulsive interaction. In the presence of strong attractive nearest-neighbor interaction and repulsive next-to-nearest-neighbor interaction, the system crosses into a regime in which fermions form tightly bound pairs, which behave as bosonic entities. By means of numerical simulations based on the density-matrix-renormalization-group (DMRG) method, we show in particular that in the strongly paired regime, the gauge flux induces a quantum phase transition of the Ising type from vortex density wave (VDW) to a charge density wave (CDW), characteristic of bosonic systems.
9 pages, 16 figures. Updated version after publication in Phys. Rev. B
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Cited by in corpus (5)
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- Interacting bosonic flux ladders with a synthetic dimension: Ground-state phases and quantum quench dynamics
- Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder
- Quasi-flat-band physics in a two-leg ladder model and its relation to magic-angle twisted bilayer graphene
- Quantum Phases of a Weakly Disordered Josephson Ladder