Maximum Spontaneous Magnetization and Nambu-Goldstone Mode
Maximum Spontaneous Magnetization and Nambu-Goldstone Mode
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最大自发磁化和南部-戈德斯通模式
DOI:
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
T. Koma
中科院分区:
文献类型:
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作者:
T. Koma
We study quantum antiferromagnetic Heisenberg models on a hypercubic lattice. We prove the following three theorems without any assumption: (i) The spontaneous magnetization which is obtained by applying the infinitesimally weak symmetry breaking field is equal to the maximum spontaneous magnetization at zero or non-zero low temperatures. (ii) When the spontaneous magnetization is non-vanishing at zero temperature, there appears a gapless excitation, Nambu-Goldstone mode, above an infinite-volume pure ground state. (iii) When the spontaneous magnetization is non-vanishing at zero or non-zero low temperatures, the transverse correlation in the infinite-volume limit exhibits a Nambu-Goldstone-type slow decay.
影响因子:
1.6
作者:
Y Oka;S Suetaka;H Ago;Y Miyachi;Y Hayashi;M Arai;Hal Tasaki
通讯作者:
Hal Tasaki