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arXiv 2207.02477quant-ph
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含时SU(1,1)和SU(2)系统超越PT对称的非厄米哈密顿量--伪不变理论中的精确解和几何相位

Non-Hermitian Hamiltonian beyond PT-symmetry for time-dependant SU(1,1) and SU(2) systems -- exact solution and geometric phase in pseudo-invariant theory

Nadjat Amaouche, Maroua Sekhri, Rahma Zerimeche, Maamache Mustapha, J. -Q. Liang

摘要:

本文研究了含时的非厄米哈密顿量,它们分别由SU(1,1)和SU(2)生成元构成。前者是PT对称的,而后者不是。提出了一种含时非酉算子来构造非厄米不变量,并证明了该不变量是具有实特征值的伪厄米不变量。统一地得到了SU(1,1)和SU(2)系统的精确解。然后,我们推导出LR相位,它可以分为动态相位和几何相位。分析结果与文献中相应的厄米哈密顿量完全一致。

英文摘要:

We investigate in this paper time-dependent non-Hermitian Hamiltonians, which consist respectively of SU(1,1) and SU(2) generators. The former Hamiltonian is PT symmetric but the latter one is not. A time-dependent non-unitary operator is proposed to construct the non-Hermitian invariant, which is verified as pseudo-Hermitian with real eigenvalues. The exact solutions are obtained in terms of the eigenstates of the pseudo-Hermitian invariant operator for both the SU(1,1)and SU(2)systems in a unified manner. Then, we derive the LR phase, which can be separated to the dynamic phase and the geometrical phase. The analytical results are exactly in agreement with those of corresponding Hermitian Hamiltonians in the literature.

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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