TY - JOUR
T1 - Phase diagram of strongly attractive p-orbital fermions on optical lattices
AU - De Silva, Theja N.
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/10/30
Y1 - 2015/10/30
N2 - We examine a system of doubly degenerate p-orbital polarized fermions on a two-dimensional square lattice with a strong on-site interaction. We consider the system density at the half filling limit and tackle the strong attractive interaction using a perturbation theory. We treat the four-site square plaquette interaction term generated from the directional tunneling dependence of p-orbitals using the fourth order in perturbation theory. We map the strong coupling particle Hamiltonian into an effective spin-Hamiltonian and then use a variational mean field approach and a linear spin-wave theory to study the phase diagram. Further, we discuss the experimental signatures of these phases within the context of current cold-atom experimental techniques.
AB - We examine a system of doubly degenerate p-orbital polarized fermions on a two-dimensional square lattice with a strong on-site interaction. We consider the system density at the half filling limit and tackle the strong attractive interaction using a perturbation theory. We treat the four-site square plaquette interaction term generated from the directional tunneling dependence of p-orbitals using the fourth order in perturbation theory. We map the strong coupling particle Hamiltonian into an effective spin-Hamiltonian and then use a variational mean field approach and a linear spin-wave theory to study the phase diagram. Further, we discuss the experimental signatures of these phases within the context of current cold-atom experimental techniques.
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U2 - 10.1016/j.physleta.2015.08.019
DO - 10.1016/j.physleta.2015.08.019
M3 - Article
AN - SCOPUS:84941806449
SN - 0375-9601
VL - 379
SP - 2715
EP - 2722
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 42
M1 - 23378
ER -