Archivio Istituzionale della RicercaA general Heisenberg system in an external field is solved by a second order cumulant cluster approximation. The uncompatibility between the solutions of the polarization selfconsistency and minimum free energy equations is discussed. A correlated mean-field is then introduced which allows the removal of such difficulty at low temperature.
Second Order Treatment of a Pseudo-Spin System. I Self-Consistency and Thermal Equilibrium / Buzano, Carla; Rasetti, Mario; Vadacchino, Mario. - In: PROGRESS OF THEORETICAL PHYSICS. - ISSN 0033-068X. - 68:3(1982), pp. 703-715. [10.1143/PTP.68.703]
Second Order Treatment of a Pseudo-Spin System. I Self-Consistency and Thermal Equilibrium
BUZANO, Carla;RASETTI, Mario;VADACCHINO, MARIO
1982
Abstract
A general Heisenberg system in an external field is solved by a second order cumulant cluster approximation. The uncompatibility between the solutions of the polarization selfconsistency and minimum free energy equations is discussed. A correlated mean-field is then introduced which allows the removal of such difficulty at low temperature.
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https://hdl.handle.net/11583/1625267
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