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arXiv 1809.06246cond-mat.str-elquant-ph
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有限费米子链中大的端对端关联的工程化

Engineering large end-to-end correlations in finite fermionic chains

Hernán Santos, José E. Alvarellos, Javier Rodríguez-Laguna

摘要:

我们探讨的变形有限链的独立费米子,从而引起他们的极端大的相关性。在对Su-Schrieffer-Heeger(SSH)模型进行了详细研究后,利用机器学习技术得到了端到端相关性与链能隙之间的权衡曲线,特别注意了链长的标度行为.我们发现,边二聚链,其中的第二和倒数第二个跳跃加强,往往接近最优配置。我们的研究结果使我们能够推测,给定一个固定的差距,最大可达到的相关性下降指数与系统的大小。对最佳构型的纠缠熵和轮廓的研究表明,体纠缠模式从干净的情况下修改最小。

英文摘要:

We explore deformations of finite chains of independent fermions which give rise to large correlations between their extremes. After a detailed study of the Su-Schrieffer-Heeger (SSH) model, the trade-off curve between end-to-end correlations and the energy gap of the chains is obtained using machine-learning techniques, paying special attention to the scaling behavior with the chain length. We find that edge-dimerized chains, where the second and penultimate hoppings are reinforced, are very often close to the optimal configurations. Our results allow us to conjecture that, given a fixed gap, the maximal attainable correlation falls exponentially with the system size. Study of the entanglement entropy and contour of the optimal configurations suggest that the bulk entanglement pattern is minimally modified from the clean case.

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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