AI Article Synopsis
- The paper examines how a slight change in a quantum system's properties affects its eigenstates, helping to understand the transition from orderly (integrable) to chaotic behavior.
- It introduces a specific quantity to quantify this change, based on very small adjustments to the eigenfunctions of the system, which indicates how likely level transitions are due to the perturbation.
- Using this method, simulations of the Lipkin-Meshkov-Glick model reveal a transition area that splits into three parts: nearly integrable, nearly chaotic, and a crossover zone between the two.
Article Abstract
In this paper, a quantity that describes a response of a system's eigenstates to a very small perturbation of physical relevance is studied as a measure for characterizing crossover from integrable to chaotic quantum systems. It is computed from the distribution of very small, rescaled components of perturbed eigenfunctions on the unperturbed basis. Physically, it gives a relative measure to prohibition of level transitions induced by the perturbation. Making use of this measure, numerical simulations in the so-called Lipkin-Meshkov-Glick model show in a clear way that the whole integrability-chaos transition region is divided into three subregions: a nearly integrable regime, a nearly chaotic regime, and a crossover regime.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9955957 | PMC |
| http://dx.doi.org/10.3390/e25020366 | DOI Listing |
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