Finite size mean-field models
作者： M Fannes , C Vandenplas
DOI: 10.1088/0305-4470/39/45/001
关键词: Quantum 、 Quantum mechanics 、 Quantum system 、 Ground state 、 Spins 、 Spin states 、 Mean field theory 、 Invariant (physics) 、 Mathematics
摘要: We characterize the two-site marginals of exchangeable states a system quantum spins in terms simple positivity condition. This result is used two applications. first show that distance between permutation invariant on N and order 1/N. The second application relates mean ground state energy mean-field model composite interacting through product pair interaction with energies components.
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