Long-Range Order, “Tower” of States, and Symmetry Breaking in Lattice Quantum Systems
Long-Range Order, “Tower” of States, and Symmetry Breaking in Lattice Quantum Systems
复制标题
晶格量子系统中的长程有序、态“塔”和对称破缺
DOI:
10.1007/s10955-018-2193-8
复制
发表时间:
2019
影响因子:
1.6
通讯作者:
Hal Tasaki
中科院分区:
文献类型:
--
作者:
Y Oka;S Suetaka;H Ago;Y Miyachi;Y Hayashi;M Arai;Hal Tasaki
In a quantum many-body system where the Hamiltonian and the order operator do not commute, it often happens that the unique ground state of a finite system exhibits long-range order (LRO) but does not show spontaneous symmetry breaking (SSB). Typical examples include antiferromagnetic quantum spin systems with Néel order, and lattice boson systems which exhibits Bose–Einstein condensation. By extending and improving previous results by Horsch and von der Linden and by Koma and Tasaki, we here develop a fully rigorous and almost complete theory about the relation between LRO and SSB in the ground state of a finite system with continuous symmetry. We show that a ground state with LRO but without SSB is inevitably accompanied by a series of energy eigenstates, known as the “tower” of states, which have extremely low excitation energies. More importantly, we also prove that one gets a physically realistic “ground state” by taking a superposition of these low energy excited states.
登录
查看更多内容
影响因子:
1.6
作者:
H. Nishimori
通讯作者:
H. Nishimori
DOI:
10.1103/physrevlett.42.1503
发表时间:
1979
期刊:
--
影响因子:
--
作者:
D. Mattis
通讯作者:
D. Mattis
DOI:
--
发表时间:
2017
期刊:
arXiv: Mathematical Physics
影响因子:
--
作者:
T. Koma
通讯作者:
T. Koma
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Hironobu Sakaguchi, Masato Ohashi;Yuta Uetake;Takashi Niwa, Takamitsu Hosoya;Sensuke Ogoshi;Hal Tasaki
通讯作者:
Hal Tasaki
影响因子:
1.6
作者:
T. Kennedy;E. Lieb;B. Shastry
通讯作者:
B. Shastry