Portal de Periódicos da CAPES

Passive states and KMS states for general quantum systems

1978; Springer Science+Business Media; Volume: 58; Issue: 3 Linguagem: Inglês

10.1007/bf01614224

1432-0916

W. Pusz, S. L. Woronowicz,

Quantum many-body systems

We characterize equilibrium states of quantum systems by a condition of passivity suggested by the second principle of thermodynamics. Ground states and β-KMS states for all inverse temperatures β≧0 are completely passive. We prove that these states are the only completely passive ones. For the special case of states describing pure phases, assuming the passivity we reproduce the results of Haag et al.