Open AccessPHASE DIGRAM OF SPIN 1/2 XXZ CHAIN
Author(s) -
Zhi-Jian Chen,
Yumei Zhang,
Bo-Wei Xu
Publication year - 1995
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.44.1697
Subject(s) - physics , cutoff , sine , chain (unit) , gaussian , phase diagram , momentum (technical analysis) , phase (matter) , spin (aerodynamics) , quantum , mathematical physics , quantum mechanics , mathematics , geometry , finance , economics , thermodynamics
By mapping the spin 1/2 XXZ quantum chain to sine-Gordon model, we have analyzed the phase diagram of sine-Gordon model using tke method of gaussian wave functional and taking the large momentum cutoff. We have obtained the mas-sless region which agrees with the exact solution quite well.