2012/10/31 by Xiaopeng Li, W. Vincent Liu
Physics and Astronomy · #Atomic orbital #Bosonization #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dipole #Electron #Fermion #Optical lattice #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Superfluidity #Topological Materials and Phenomena #cond-mat.quant-gas #cond-mat.str-el
paper · pdf · doi:10.1103/physreva.87.063605
published as Phys. Rev. A 87, 063605 (2013) · 6+ pages, 4 figures, added two figures
arxiv created 2013/05/12 · openalex publication_date 2013/06/05 · arxiv updated 2013/06/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study a quantum ladder of interacting fermions with coupled s and p orbitals. Such a model describes dipolar molecules or atoms loaded into a double-well optical lattice, dipole moments being aligned by an external field. The two orbital components have distinct hoppings. The tunneling between them is equivalent to a partial Rashba spin-orbital coupling when the orbital space (s, p) is identified as spanned by pseudospin 1/2 states. A rich phase diagram, including incommensurate orbital density wave, pair density wave, and other exotic superconducting phases, is proposed with bosonization analysis. In particular, superconductivity is found in the repulsive regime.