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DOI	10.1016/j.scib.2021.02.035
	Simulation of higher-order topological phases and related topological phase transitions in a superconducting qubit
	Niu J.; Yan T.; Zhou Y.; Tao Z.; Li X.; Liu W.; Zhang L.; Jia H.; Liu S.; Yan Z.; Chen Y.; Yu D.
发表日期	2021
ISSN	20959273
起始页码	1168
结束页码	1175
卷号	66 期号:12
英文摘要	Higher-order topological phases give rise to new bulk and boundary physics, as well as new classes of topological phase transitions. While the realization of higher-order topological phases has been confirmed in many platforms by detecting the existence of gapless boundary modes, a direct determination of the higher-order topology and related topological phase transitions through the bulk in experiments has still been lacking. To bridge the gap, in this work we carry out the simulation of a two-dimensional second-order topological phase in a superconducting qubit. Owing to the great flexibility and controllability of the quantum simulator, we observe the realization of higher-order topology directly through the measurement of the pseudo-spin texture in momentum space of the bulk for the first time, in sharp contrast to previous experiments based on the detection of gapless boundary modes in real space. Also through the measurement of the evolution of pseudo-spin texture with parameters, we further observe novel topological phase transitions from the second-order topological phase to the trivial phase, as well as to the first-order topological phase with nonzero Chern number. Our work sheds new light on the study of higher-order topological phases and topological phase transitions. © 2021 Science China Press
关键词	Higher-order topological phases Quantum simulation Superconducting circuits Topological phase transitions
英文关键词	Qubits; Textures; Topology; High-order; High-order topological phase; Higher-order; Order topologies; Quantum simulations; Second orders; Superconducting circuit; Superconducting qubits; Topological phase; Topological phase transition; Quantum chemistry
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207530
作者单位	Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China; Guangdong Provincial Key Laboratory of Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China; Shenzhen Key Laboratory of Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China; School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
推荐引用方式 GB/T 7714	Niu J.,Yan T.,Zhou Y.,et al. Simulation of higher-order topological phases and related topological phase transitions in a superconducting qubit[J],2021,66(12).
APA	Niu J..,Yan T..,Zhou Y..,Tao Z..,Li X..,...&Yu D..(2021).Simulation of higher-order topological phases and related topological phase transitions in a superconducting qubit.Science Bulletin,66(12).
MLA	Niu J.,et al."Simulation of higher-order topological phases and related topological phase transitions in a superconducting qubit".Science Bulletin 66.12(2021).