Phase transition in dissipative Fermi systems

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Abstract
A dissipative Fermi system is defined and the low-temperature thermodynamics is examined. Below a critical density the system behaves as a Boltzmann gas with Curie behavior of the susceptibility. Above the critical density, conventional Fermi behavior reappears, with Pauli behavior of the susceptibility. The diamagnetic susceptibility is smooth through the transition region which thus represents a type of metal-to-metal transition. In contrast, a dissipative ideal Bose system is Boltzmann-like for any density at low temperature.