Static properties and spin dynamics of the ferromagnetic spin-1 Bose gas in magnetic field

Properties of spin-1 Bose gases with ferromagnetic interaction in the presence of a nonzero magnetic field are studied. The equation of state and thermodynamic quantities are worked out with the help of a mean-field approximation. The phase diagram besides Bose-Einstein condensation contains a first...

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Bibliographic Details
Published in:arXiv.org 2004-10
Main Authors: Kis-Szabo, Krisztian, Szepfalusy, Peter, Szirmai, Gergely
Format: Article
Language:English
Subjects:
Approximation
Critical point
Equations of state
Ferromagnetism
Magnetic fields
Magnetic properties
Mathematical analysis
Phase diagrams
Phase transitions
Spin dynamics
Online Access:Get full text
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Summary:Properties of spin-1 Bose gases with ferromagnetic interaction in the presence of a nonzero magnetic field are studied. The equation of state and thermodynamic quantities are worked out with the help of a mean-field approximation. The phase diagram besides Bose-Einstein condensation contains a first order transition where two values of the magnetization coexist. The dynamics is investigated with the help of the Random Phase Approximation. The soft mode corresponding to the critical point of the magnetic phase transition is found to behave like in conventional theory.
ISSN:2331-8422
DOI:10.48550/arxiv.0410501