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LU, ZY; YAN, H; LU, ZY , ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA. | |
THE Q-DEFORMED SU(2) QUANTUM FERROMAGNETIC MODEL | |
Source Publication | COMMUNICATIONS IN THEORETICAL PHYSICS |
Keyword | Yang-baxter Equation Suq Differential-calculus H->0(2) Harmonic-oscillator Diatomic-molecules Q-deformations Lie-algebra Q-analogs Representations Systems |
Abstract | A q-deformed SU(2) Heisenberg (3-dimensional) spin model is set up, and the q-deformed spin-wave solution is obtained through the q-analogous Holstein-Primakoff transformation. The result is given for small gamma = ln q, which is the quantity characterizing the nonlinearity of the Hamiltonian. A mean-field treatment is arranged to preserve (at least some of) the nonlinearity, and the ordinary ferromagnet ground state is shown as the exact ground state of the new system. Interesting results are obtained for this nonlinear model: (i) There is an energy gap between the ground state and the first excited one, thus the ground state is stable under small perturbation of the background; (ii) the specific heat per volume is modified by a small term proportional to the (112)-th power of temperature and the square of gamma, which is qualitatively different from the conventional model, and (iii) the magnetization M(T) is modified by a factor that depends on gamma. |
1993 | |
ISSN | 0253-6102 |
Volume | 19Issue:2Pages:169-178 |
Subject Area | Physics |
Indexed By | SCI |
Document Type | 期刊论文 |
Identifier | http://ir.itp.ac.cn/handle/311006/12101 |
Collection | SCI期刊论文 |
Corresponding Author | LU, ZY , ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA. |
Recommended Citation GB/T 7714 | LU, ZY,YAN, H,LU, ZY , ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA.. THE Q-DEFORMED SU(2) QUANTUM FERROMAGNETIC MODEL[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,1993,19(2):169-178. |
APA | LU, ZY,YAN, H,&LU, ZY , ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA..(1993).THE Q-DEFORMED SU(2) QUANTUM FERROMAGNETIC MODEL.COMMUNICATIONS IN THEORETICAL PHYSICS,19(2),169-178. |
MLA | LU, ZY,et al."THE Q-DEFORMED SU(2) QUANTUM FERROMAGNETIC MODEL".COMMUNICATIONS IN THEORETICAL PHYSICS 19.2(1993):169-178. |
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