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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | Mattis, Daniel C. | Exactly soluble model of interacting electrons | We diagonalize a many-fermion Hamiltonian consisting of terms quadratic as well as quartic in the field operators. A dual spectrum of eigenstates is an interesting result. We also derive a formula for obtaining the free energy at finite temperature. | Eigenstates; Free energy; Excitation spectrum | 1972 |
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