Ferromagnetism in the Hubbard model with an infinite-range hopping
classification
❄️ cond-mat
keywords
hoppinghubbardinfinite-rangenumberconjecturedelectronsferromagneticferromagnetism
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We prove, as recently conjectured, that the ground state of the Hubbard Hamiltonian with an infinite-range hopping, when the number of electrons $N_e=N+1$ ($N$ being the number of sites), is ferromagnetic fully polarized.
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