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- W2904933239 abstract "We study a two-component mixture of fermionic dipoles in two dimensions at zero temperature, interacting via a purely repulsive $1/r^3$ potential. This model can be realized with ultracold atoms or molecules, when their dipole moments are aligned in the confinement direction orthogonal to the plane. We characterize the unpolarized mixture by means of the Diffusion Monte Carlo technique. Computing the equation of state, we identify the regime of validity for a mean-field theory based on a low-density expansion and compare our results with the hard-disk model of repulsive fermions. At high density, we address the possibility of itinerant ferromagnetism, namely whether the ground state can be fully polarized in the fluid phase. Within the fixed-node approximation, we show that the accuracy of Jastrow-Slater trial wave functions, even with the typical two-body backflow correction, is not sufficient to resolve the relevant energy differences. By making use of the iterative-backflow improved trial wave functions, we observe no signature of a fully-polarized ground state up to the freezing density." @default.
- W2904933239 created "2018-12-22" @default.
- W2904933239 creator A5013295480 @default.
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- W2904933239 creator A5053895172 @default.
- W2904933239 creator A5063953301 @default.
- W2904933239 creator A5072595192 @default.
- W2904933239 date "2019-04-08" @default.
- W2904933239 modified "2023-10-10" @default.
- W2904933239 title "Two-dimensional mixture of dipolar fermions: Equation of state and magnetic phases" @default.
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- W2904933239 doi "https://doi.org/10.1103/physreva.99.043609" @default.
- W2904933239 hasPublicationYear "2019" @default.
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