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arXiv 1703.04472quant-phmath-phmath.MPphysics.chem-ph
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通过量子、半量子和经典模型研究具有对称性和伪对称性的分子汉密尔顿的拓扑相变

Topological Phase Transition in a Molecular Hamiltonian with Symmetry and Pseudo-Symmetry, Studied through Quantum, Semi-Quantum and Classical Models

Guillaume Dhont, Toshihiro Iwai, Boris Zhilinskii

摘要:

研究了一类依赖于一个控制参数的简单有效哈密顿量族的能带间能级的重新分布,该哈密顿量族具有轴对称性和能量反射对称性.进一步研究了相应的半量子模型和完全经典模型中的拓扑相变,最后将两个可交换观测量$(H=E,J_z)$(又称量子态格)的联合谱叠加在经典模型的能量-动量映象上.通过这些比较分析,证明了量子哈密顿量能带间能级的重新分布、相应半量子哈密顿量本征线丛的Chern数的修正以及完全经典模拟哈密顿量的单值性之间存在相互对应关系.特别是,就能带重排而言,一个很好的协议之间的重新分配的能级描述的联合频谱的能量和动量的完整的量子模型和演化的奇异性的能量-动量映射。在本半量子模型和完全经典模型中观察到的拓扑相变类似于物质的拓扑相变。

英文摘要:

The redistribution of energy levels between energy bands is studied for a family of simple effective Hamiltonians depending on one control parameter and possessing axial symmetry and energy-reflection symmetry. Further study is made on the topological phase transition in the corresponding semi-quantum and completely classical models, and finally the joint spectrum of the two commuting observables $(H=E,J_z)$ (also called the lattice of quantum states) is superposed on the image of the energy-momentum map for the classical model. Through these comparative analyses, mutual correspondence is demonstrated to exist among the redistribution of energy levels between energy bands for the quantum Hamiltonian, the modification of Chern numbers of eigenline bundles for the corresponding semi-quantum Hamiltonian, and the presence of Hamiltonian monodromy for the complete classical analog. In particular, as far as the band rearrangement is concerned, a fine agreement is found between the redistribution of the energy levels described in terms of joint spectrum of energy and momentum in the full quantum model and the evolution of singularities of the energy-momentum map of the complete classical model. The topological phase transition observed in the present semi-quantum and the complete classical models are analogous to topological phase transitions of matter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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