2014/06/30 by E. Szirmai, Edina Szirmai, H. Nonne +1 · 4 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Valence (chemistry) #cond-mat.quant-gas #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.90.245135
published in Physical Review B 90(24) (American Physical Society) · 9 pages, 8 figures
openalex publication_date 2014/12/22 · arxiv created 2015/01/16 · arxiv updated 2015/01/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the possible ground-state configurations of two strongly coupled chains of charge neutral spin-(3)/(2) fermionic atoms interacting via short-range van der Waals interaction. The coupling between the two chains is realized by a relatively large hopping amplitude. Exploiting the fact that such a ladder configuration can be mapped to an effective one-band model, we analyze the emerging ground states of the system. We show that various spatially inhomogeneous states, valence-bond states, and plaquette states compete depending on the filling and the ratio of the interaction strengths in the singlet and quintet scattering channel. We find that a Luttinger liquid state is the ground state of the strongly coupled ladder in an extended region of the parameter space, and we also show that a topologically nontrivial charge Haldane state can emerge in the strongly coupled ladder at quarter and three-quarter fillings.