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Goldstone’s theorem for quantum spin systems of finite range

1976; American Institute of Physics; Volume: 17; Issue: 1 Linguagem: Inglês

10.1063/1.522789

1527-2427

Walter F. Wreszinski,

Quantum chaos and dynamical systems

Goldstone’s theorem is proved for quantum spin systems of finite range with rotationally invariant Hamiltonian under the assumptions that the ground state of the infinite system is unique, is invariant under a subset of the translation group (which depends on the system), and has long range order.