• Title/Summary/Keyword: Gibbs variational principle

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VARIATIONAL PRINCIPLE FOR QUANTUM UNBOUNDED SPIN SYSTEMS

  • Choi, S.D.;Jo, S.G.;Kim, H.I.;Lee, H.H.;Yoo, H.J.
    • Journal of the Korean Mathematical Society
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    • v.37 no.4
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    • pp.579-592
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    • 2000
  • We study the variational principle for quantum unbounded spin systems interacting via superstable and regular interactions. We show that the (weak) KMS state constructed via the thermodynamic limit of finite volume Green's functions satisfies the Gibbs variational equality.

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