THERMODYNAMICS OF THE ATTRACTIVE HUBBARD CHAIN

The thermodynamic Bethe ansatz equations for the attractive Hubbard ch ain are solved numerically. The entropy, specific heat, gamma-values, band filling, spin and charge susceptibilities are obtained as a funct ion of temperature, interaction strength and chemical potential in zer o magnetic field. The dominant states at low temperatures are spin-pai red electrons. The spin susceptibility is vanishingly small at low tem peratures due to the spin gap.