Coupled pair approach for strongly-interacting trapped fermionic atoms
arXiv:1405.3744 · doi:10.1103/PhysRevA.90.023626
Abstract
We present a coupled pair approach for studying few-body physics in harmonically trapped ultracold gases. The method is applied to a two-component Fermi system of particles. A stochastically variational gaussian expansion method is applied, focusing on optimization of the two-body correlations present in the strongly interacting, or unitary, limit. The groundstate energy of the four-, six- and eight-body problem with equal spin populations is calculated with high accuracy and minimal computational effort. We also calculate the structural properties of these systems and discuss their implication for the many-body ultracold gas and other few-body calculations.
7 pages, 4 figures
References in corpus (11)
- Many-Body Physics with Ultracold Gases
- Theory of ultracold Fermi gases
- Weakly bound dimers of fermionic atoms
- Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
- Phase diagram of a two-component Fermi gas with resonant interactions
- Molecules of Fermionic Atoms in an Optical Lattice
- Virial expansion for a strongly correlated Fermi gas
- Universal properties of a trapped two-component Fermi gas at unitarity
- Three attractively interacting fermions in a harmonic trap: Exact solution, ferromagnetism, and high-temperature thermodynamics
- Level crossing in the three-body problem for strongly interacting fermions in a harmonic trap
- Density-functional theory for fermions in the unitary regime