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arXiv 2303.04582quant-ph
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固态量子系统中相互作用诱导的拓扑泵浦

Interaction-induced topological pumping in a solid-state quantum system

Ziyu Tao, Wenhui Huang, Jingjing Niu, Libo Zhang, Yongguan Ke, Xiu Gu, Ling Lin, Jiawei Qiu, Xuandong Sun, Xiaohan Yang, Jiajian Zhang, Jiawei Zhang, Shuxiang Z… 展开作者

Ziyu Tao, Wenhui Huang, Jingjing Niu, Libo Zhang, Yongguan Ke, Xiu Gu, Ling Lin, Jiawei Qiu, Xuandong Sun, Xiaohan Yang, Jiajian Zhang, Jiawei Zhang, Shuxiang Zhao, Yuxuan Zhou, Xiaowei Deng, Changkang Hu, Ling Hu, Jian Li, Yang Liu, Dian Tan, Yuan Xu, Tongxing Yan, Yuanzhen Chen, Chaohong Lee, Youpeng Zhong, Song Liu, Dapeng Yu

AI总结:

本研究在36个超导量子比特构成的固态量子系统中,利用强相互作用与位点可控性实现了相互作用诱导的拓扑泵浦,观测到多种拓扑输运现象,为多体拓扑相关研究提供了新范式与路径。

摘要:

作为产生多粒子量子关联的基础,粒子间相互作用在集体量子现象、量子相变和量子信息处理中发挥着关键作用,它能深刻改变量子多体系统的能带结构,并催生奇异的拓扑现象。已在受驱线性或非相互作用系统中得到充分验证的传统拓扑泵浦,在强相互作用存在时可能会失效。然而,能带拓扑与相互作用的共同作用也可能诱导出相互作用粒子的涌现拓扑泵浦,但其在实验上的实现一直颇具挑战。本研究在由36个超导量子比特组成的阵列构成的固态量子系统中,演示了相互作用诱导的拓扑泵浦。借助量子比特固有的强相互作用,以及晶格势和跃迁强度的位点分辨可控性,我们实现了单粒子和两个束缚粒子的拓扑Thouless泵浦。除了这些存在线性或非相互作用对应情形的拓扑现象外,我们还观测到了相互作用粒子的拓扑共振隧穿和非对称边缘态输运。本研究为多粒子拓扑效应构建了新范式,也为奇异拓扑现象、多体量子输运和量子信息传输的研究提供了新途径。

英文摘要:

As the basis for generating multi-particle quantum correlations, inter-particle interaction plays a crucial role in collective quantum phenomena, quantum phase transitions, and quantum information processing. It can profoundly alter the band structure of quantum many-body systems and give rise to exotic topological phenomena. Conventional topological pumping, which has been well demonstrated in driven linear or noninteracting systems, may break down in the presence of strong interaction. However, the interplay between band topology and interaction could also induce emergent topological pumping of interacting particles, but its experimental realization has proven challenging. Here we demonstrate interaction-induced topological pumping in a solid-state quantum system comprising an array of 36 superconducting qubits. With strong interaction inherent in the qubits and site-resolved controllability of the lattice potential and hopping strength, we realize the topological Thouless pumping of single and two bounded particles. Beyond these topological phenomena with linear or noninteracting counterparts, we also observe topologically resonant tunneling and asymmetric edge-state transport of interacting particles. Our work creates a paradigm for multi-particle topological effects, and provides a new pathway to the study of exotic topological phenomena, many-body quantum transport, and quantum information transfer.

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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