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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | Mattis, Daniel C. | Exact wave functions in superconductivity | The ground-state wave function and some of the excited states of the BCS reduced Hamiltonian are found. In the limit of large volume, the boundary and continuity conditions on the exact wave function lead directly to the equations which Bardeen, Cooper, and Schrieffer found by a variational techniqu... | Ground states | 1961 |
| 2 |
 | Mattis, Daniel C. | Ground state of interacting spins | The question is posed of how the ground state of the Heisenberg Hamiltonian H= - ΣFij Si-Sj depends on the magnitude s of N interacting spins, particularly in the case of long-ranged oscillatory interactions Fij. It is discussed whether fixing the geometry and the bond strengths Fij suffices to d... | Ground states; Interacting spin; Ruderman-Kittel interaction | 1963-04 |
| 3 |
 | Wu, Yong-Shi | Ground states and thermal states of the random field Ising model | The random field Ising model is studied numerically at both zero and positive temperature. Ground states are mapped out in a region of random field and external field strength. Thermal states and thermodynamic properties are obtained for all temperatures using the Wang-Landau algorithm. The specific... | Ground states; Thermal states | 2005-09 |
| 4 |
 | Wu, Yong-Shi | Numerical study of the three-dimensional random-field Ising model at zero and positive temperature | In this paper the three-dimensional random-field Ising model is studied at both zero temperature and positive temperature. Critical exponents are extracted at zero temperature by finite size scaling analysis of large discontinuities in the bond energy. The heat capacity exponent α is found to be n... | Bond energies; Ground states | 2006-08 |
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