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arXiv 2402.13657cond-mat.quant-gasphysics.atom-ph
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Floquet驱动的里德伯原子中的高阶与分数离散时间晶体

Higher-order and fractional discrete time crystals in Floquet-driven Rydberg atoms

Bang Liu, Li-Hua Zhang, Qi-Feng Wang, Yu Ma, Tian-Yu Han, Jun Zhang, Zheng-Yuan Zhang, Shi-Yao Shao, Qing Li, Han-Chao Chen, Bao-Sen Shi, Dong-Sheng Ding

AI总结:

本文提出在Floquet驱动的里德伯原子气体中实验观测高阶和分数离散时间晶体的方法,发现了n=2、3、4及最高达14的整数n-DTCs和超出整数的分数n-DTCs,拓展了非平衡动力学中时间对称性的研究。

摘要:

高阶和分数离散时间晶体(DTCs)是一类奇异的物质相,其中离散时间平移对称性被破缺为高阶和非整数类别。在不同系统中,这些独特DTCs的产生已在理论上得到广泛研究。然而,目前没有任何实验方法能够在任何量子多体系统中探测这些高阶和分数DTCs。我们展示了一种在Floquet驱动的里德伯原子气体中观测高阶和分数DTCs的实验方法。我们发现了多个n-DTCs,其整数n值为2、3和4,其他n值最高可达14,同时还发现了n值超出整数的分数n-DTCs。系统响应可以在相邻的整数DTCs之间转变,在此过程中研究了分数DTCs。对高阶和分数DTCs的研究拓展了关于非平衡动力学的基础知识,并有望发现超越单一离散时间平移对称性的更复杂时间对称性。

英文摘要:

Higher-order and fractional discrete time crystals (DTCs) are exotic phases of matter where the discrete time translation symmetry is broken into higher-order and non-integer category. Generation of these unique DTCs has been widely studied theoretically in different systems. However, no current experimental methods can probe these higher-order and fractional DTCs in any quantum many-body systems. We demonstrate an experimental approach to observe higher-order and fractional DTCs in Floquet-driven Rydberg atomic gases. We have discovered multiple $n$-DTCs with integer values of $n$ = 2, 3, and 4, and others ranging up to 14, along with fractional $n$-DTCs with $n$ values beyond the integers. The system response can transition between adjacent integer DTCs, during which the fractional DTCs are investigated. Study of higher-order and fractional DTCs expands fundamental knowledge of non-equilibrium dynamics and is promising for discovery of more complex temporal symmetries beyond the single discrete time translation symmetry.

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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