搜索结果: 16-30 共查到“物理学 Heisenberg”相关记录49条 . 查询时间(0.101 秒)
Phase Structure of Anisotropic Antiferromagnetic Heisenberg Model on Layered Triangular Lattice: Spiral State and Deconfined Spin Liquid
Phase Structure Deconfined Spin Liquid
2010/10/27
In the present paper, we study spin- 1 2 antiferromagnetic (AF) Heisenberg model on layered anisotropic triangular lattice and obtain its phase structure. We use the Schwinger bosons for representing ...
Thermodynamic limit of particle-hole form factors in the massless XXZ Heisenberg chain
Thermodynamic limit particle-hole XXZ Heisenberg chain
2010/4/6
We study the thermodynamic limit of the particle-hole form factors of the XXZ Heisenberg chain in the massless regime. We show that, in this limit, such form factors decrease as an explicitly computed...
Thermal quantum discord in the anisotropic Heisenberg XXZ model with the Dzyaloshinskii-Moriya interaction
quantum discord Dzyaloshinskii-Moriya anisotropic Heisenberg XXZ
2010/3/10
The thermal quantum discord (QD) is studied in a two-qubit Heisenberg XXZ system with Dzyaloshinskii-Moriya (DM) interaction. We compare the thermal QD with thermal entanglement in this system and fin...
Heisenberg spin textures on a cylinder with topological defects
Heisenberg’s spins nanomagnetism
2010/7/8
The present work aims to study equilibrium configurations of spins on a cylinder with topological defects such as screw dislocation and deficit angle. By making use of elliptic-f expansion method, whi...
Quasideterminant solutions of the generalized Heisenberg magnet model
Heisenberg magnet Lie group SU(2)
2010/4/7
In this paper we present Darboux transformation for the generalized Heisenberg magnet (GHM) model based on general linear Lie group GL(n) and construct multi-soliton solutions in terms of quasidetermi...
The Nobel Prize in Physics 1932, Werner Karl Heisenberg, for the creation of quantum mechanics, the application of which has, inter alia, led to the discovery of the allotropic forms of hydrogen.
Teleportation via thermally entangled states of a two-qubit Heisenberg XXZ chain
Heisenberg XXZ chain teleportation thermal entanglement
2009/8/14
We investigate quantum teleportation as a tool to study the thermally entangled state of a two-qubit Heisenberg XXZ chain. Our work is mainly to investigate the characteristics of a Heisenberg XXZ cha...
研究了存在次近邻相互作用(耦合)时Heisenberg XX链的纠缠特性. 结果表明对近邻格点, 随着耦合常数J的变化, 次近邻相互作用的存在可能使其纠缠度增大或者减小; 而对次近邻格点, 引进次近邻相互作用却可以产生纠缠, 并且使其随着|J|的增大而增大. 近邻格点间纠缠存在的临界温度Tc随着J的增大而降低, 次近邻格点间纠缠存在的临界温度Tc随着|J|的增大而升高. 此外对纠缠W态的制备, 次...
二维Heisenberg反铁磁系统中的正则变换和自旋波
自旋波 正则变换 反铁磁 二维Heisenberg
2009/7/7
本文给出了二维Heisenberg反铁磁系统中的正则变换.在此变换下发现二维Heisenberg反铁磁模型在连续极限下是具有拓扑项的O(3)非线性σ模型.由于在选取正则变量时有很大的不确定性,因此还不能判定此系统是否确有拓扑项存在.最后对正则变换的物理意义进行了研究,发现它体现了系统自旋的集体激发,表明存在着一种自旋波.
本文由平均场有效场论方法出发,应用高级绝热近似的计算技术,一般地研究了Heisenberg自旋模型的有效作用量及其高阶修正.在低温情况下,附加的拓扑作用量可等效地理解为单自旋在多粒子平均场中的等效Berry相位的叠加.
多量子位Heisenberg模型中纠缠的时间演化特性
Heisenberg模型 多体纠缠 次近邻相互作用
2008/12/2
研究了多量子位Heisenberg模型中纠缠的时间演化特性, 并给出了平均纠缠度〈C〉和多体纠缠度Q的解析表达式. 结果发现无论是对〈C〉还是对Q随着时间t的不断增长, 它们均先线性的增大, 而后达到一近似稳定状态, 并绕一平衡值做无规则的上下震荡. 若进一步考察N〈C〉则还可以发现, 纠缠上下震荡的平衡值与Heisenberg链的长度几乎无关, 而仅由它们的次近邻耦合常数J决定.
含杂质三量子位Heisenberg XXX链的全局两体纠缠
Heisenberg XXX链 全局两体纠缠 杂质
2008/12/2
研究了含杂质三量子位Heisenberg XXX链的全局两体纠缠, 通过计算N12-3和N1-23, 发现两体纠缠存在的临界温度Tc随杂质参数J1的增加而升高. 给定温度T, 相应的纠缠存在的临界杂质
参数J1c随磁场的增加而增加, 而且可以通过调节杂质参数J1和磁场B来控制N12-3和N1-23的取值. 此外, 随着温度的增加, N12-3的最大值将由0.5减小到0.3727, 而N1-23的...
独立物理力学量算符和的Heisenberg表示
独立物理力学算符和 对应力学量 独立算符 和算符 Heisenberg表示
2008/11/28
从独立算符和的Heisenberg表示的本征值方程出发，利用其乘法规则，由简到繁，由公式到实例，给出了两个任意有限维独立算符和的Heisenberg矩阵表达式，它可作为相关问题研究直接可用的公式，也为本科量子力学教材的扩充提供了素材。
阻挫诱导的亚铁磁性Heisenberg系统中的量子相变
准一维反铁磁自旋链 亚铁磁性 密度矩阵重整化群 自旋能隙
2008/5/14
利用密度矩阵重整化群(DMRG)方法研究磁性阻挫对一种S=1/2准一维反铁磁自旋链但却具有亚铁磁性的Heisenberg系统基态的影响.计算了单个晶胞的基态能、自旋关联函数以及自旋能隙.研究表明这种Heisenberg自旋系统的基态随着阻挫α的增强将从磁有序相变化到自旋无序相，并且伴随着自旋能隙的出现，量子相变点为α≈0.412.同时线形链上格点间自旋长程关联值的计算结果表明在磁有序区间体系的磁有...
Coupled Band Gap Solitons in One-Dimensional Alternating
Heisenberg Ferromagnetic Chains
gap solitons Heisenberg ferromagnetic chains
2007/8/15
2001Vol.36No.4pp.477-482DOI:
Coupled Band Gap Solitons in One-Dimensional Alternating
Heisenberg Ferromagnetic Chains
ZHU Shan-Hua1,2 and HUANG Guo-Xiang1
1 Key Laborato...