TY - JOUR
AB - We derive a lower bound on the ground state energy of the Hubbard model for given value of the total spin. In combination with the upper bound derived previously by Giuliani (J. Math. Phys. 48:023302, [2007]), our result proves that in the low density limit the leading order correction compared to the ground state energy of a non-interacting lattice Fermi gas is given by 8πaσ uσ d , where σ u(d) denotes the density of the spin-up (down) particles, and a is the scattering length of the contact interaction potential. This result extends previous work on the corresponding continuum model to the lattice case.
AU - Robert Seiringer
AU - Yin, Jun
ID - 2378
IS - 6
JF - Journal of Statistical Physics
TI - Ground state energy of the low density hubbard model
VL - 131
ER -