Classical foundations of many-particle quantum chaos

Classical foundations of many-particle quantum chaos
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多粒子量子混沌的经典基础

DOI:
10.1088/0951-7715/29/2/325
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发表时间:
2016
期刊:
影响因子:
1.7
通讯作者:
V.Al. Osipov
V.Al. Osipov
中科院分区:
数学2区
文献类型:
--
作者:
B. Gutkin;V.Al. Osipov

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在半经典理论的框架下,具有经典混沌动力学的量子系统的普遍性质可以通过具有小作用差的伙伴周期轨道之间的相关性来解释。然而,到目前为止,这种方法的范围主要局限于具有低维相空间的少数粒子系统。在本工作中,我们考虑具有局部均匀相互作用的N粒子混沌系统,其中N不一定小。基于耦合cat图的模型,我们证明了周期轨道作用之间相关性的新机制的出现。特别地,我们证明了多粒子系统特有的伙伴轨道的存在。对于足够大的N,这些新的伴星主导了相关周期轨道的频谱,似乎是构建一致的多粒子半经典理论所必需的。
In the framework of semiclassical theory the universal properties of quantum systems with classically chaotic dynamics can be accounted for through correlations between partner periodic orbits with small action differences. So far, however, the scope of this approach has been mainly limited to systems of a few particles with low-dimensional phase spaces. In the present work we consider N-particle chaotic systems with local homogeneous interactions, where N is not necessarily small. Based on a model of coupled cat maps we demonstrate emergence of a new mechanism for correlation between periodic orbit actions. In particular, we show the existence of partner orbits which are specific to many-particle systems. For a sufficiently large N these new partners dominate the spectrum of correlating periodic orbits and seem to be necessary for construction of a consistent many-particle semiclassical theory.
猫图:量子力学和经典运动
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