arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2401.04078quant-phmath-phmath.MPnlin.CD
收藏

开放量子混沌系统中谱涨落的普适性

Universality of spectral fluctuations in open quantum chaotic systems

Jisha C, Ravi Prakash

AI总结:

本研究探讨了非厄米和非幺正系综在二维平面上的谱涨落统计,发现其在耗散环境下的短程和长程关联均具普适性,并通过量子踢陀螺验证了结果。

摘要:

具有一维谱的量子混沌系统,其谱关联遵循随机矩阵的正交系综(OE)、幺正系综(UE)或辛系综(SE),具体取决于它们在时间反演和旋转下的不变性。在这封信中,我们基于矩阵元素的对称性研究了非厄米和非幺正系综,即复对称、复不对称(Ginibre)以及复四元数的自对偶矩阵系综。这些系综的特征值位于二维平面中。我们证明这些系综的涨落统计是普适的,并且在耗散环境下属于OE、UE和SE的量子混沌系统表现出相似的谱涨落。短程关联通过间距比和间距分布进行研究。对于长程关联,在非局域尺度上的展开至关重要。我们描述了一种展开具有非均匀密度的二维谱的通用方法,并使用数方差评估关联。我们发现短程和长程关联都是普适的。我们用耗散环境中的量子踢陀螺验证了我们的结果,该系统可被调节以在其保守极限下展现OE、UE和SE的对称性。

英文摘要:

Quantum chaotic systems with one-dimensional spectra follow spectral correlations of orthogonal (OE), unitary (UE), or symplectic ensembles (SE) of random matrices depending on their invariance under time reversal and rotation. In this letter, we study the non-Hermitian and non-unitary ensembles based on the symmetry of matrix elements, viz. ensemble of complex symmetric, complex asymmetric (Ginibre), and self-dual matrices of complex quaternions. The eigenvalues for these ensembles lie in the two-dimensional plane. We show that the fluctuation statistics of these ensembles are universal and quantum chaotic systems belonging to OE, UE, and SE in the presence of a dissipative environment show similar spectral fluctuations. The short-range correlations are studied using spacing ratio and spacing distribution. For long-range correlations, unfolding at a non-local scale is crucial. We describe a generic method to unfold the two-dimensional spectra with non-uniform density and evaluate correlations using number variance. We find that both short-range and long-range correlations are universal. We verify our results with the quantum kicked top in a dissipative environment that can be tuned to exhibit symmetries of OE, UE, and SE in its conservative limit.

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。

↑