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- W2002373885 abstract "We study two-band effects on ultracold fermionic atoms in optical lattices by means of dynamical mean-field theory. We find that at half filling an atomic-density-wave (ADW) state emerges owing to the two-band effects in the attractive interaction region, while an antiferromagnetic state appears in the repulsive interaction region. As the orbital splitting is increased, quantum phase transitions from the ADW state to the superfluid state and from the antiferromagnetic state to the metallic state occur in the corresponding regions. By systematically changing the orbital splitting and the interaction, we obtain the phase diagram at half filling. The results are discussed using the effective boson model derived for strong attractive interaction." @default.
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- W2002373885 date "2009-02-05" @default.
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- W2002373885 title "Density-wave and antiferromagnetic states of fermionic atoms in optical lattices" @default.
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- W2002373885 doi "https://doi.org/10.1103/physreva.79.023607" @default.
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