Trionic phase of ultracold fermions in an optical lattice: A variational study
arXiv:0707.2378 · doi:10.1103/PhysRevB.77.144520
Abstract
To investigate ultracold fermionic atoms of three internal states (colors) in an optical lattice, subject to strong attractive interaction, we study the attractive three-color Hubbard model in infinite dimensions by using a variational approach. We find a quantum phase transition between a weak-coupling superconducting phase and a strong-coupling trionic phase where groups of three atoms are bound to a composite fermion. We show how the Gutzwiller variational theory can be reformulated in terms of an effective field theory with three-body interactions and how this effective field theory can be solved exactly in infinite dimensions by using the methods of dynamical mean field theory.
14 PRB pages, 8 figures
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Cited by in corpus (4)
- Collisional stability of a three-component degenerate Fermi gas
- Spin 3/2 fermions with attractive interactions in a one-dimensional optical lattice: phase diagrams, entanglement entropy, and the effect of the trap
- Three-Component Fermi Gas in a one-dimensional Optical Lattice
- Functional renormalization for trion formation in ultracold fermion gases