Spin-wave-based tunable coupler between superconducting flux qubits

Yuan, Shaojie1,2,3; Liu, Chuanpu4; Chen, Jilei1,2; Liu, Song1,2; Lan, Jin5,6; Yu, Haiming4; Wu, Jiansheng1,2; Yan, Fei1,2; Xiao, Jiang2,7,8; Jiang, Liang9; Yu, Dapeng1,2

2023-01-30

10.1103/PhysRevA.107.012434

PHYSICAL REVIEW A   Impact Factor & Quartile

2469-9926

2469-9934

Quantum computing and simulation based on superconducting qubits have achieved significant progress and entered the noisy intermediate-scale quantum (NISQ) era recently. Using a third qubit or object as a tunable coupler between qubits is an important step in this process. In this article, we propose a hybrid system made of superconducting qubit and a yttrium iron garnet (YIG) system as an alternative way to realize this. YIG thin films have spin wave (magnon) modes with low dissipation and reliable control for quantum information processing. Here, we propose a scheme to achieve strong coherent coupling between superconducting (SC) flux qubits and magnon modes in YIG thin film. Unlike the direct ./N enhancement factor in coupling to the Kittel mode and other spin ensembles, with N the total number of spins, an additional spatial-dependent phase factor needs to be considered when the qubits are magnetically coupled with the magnon modes of finite wavelength. To avoid undesirable cancellation of coupling caused by the symmetrical boundary condition, a CoFeB thin layer is added to one side of the YIG thin film to break the symmetry. Our numerical simulation demonstrates avoided crossing and coherent transfer of quantum information between the flux qubit and the standing spin waves in YIG thin films. We show that the YIG thin film can be used as a tunable coupler between two flux qubits, which have a modified shape with small direct inductive coupling between them. Our results manifest that by cancellation of direct inductive coupling and indirect spin-wave couple of flux qubits we can turn on and off the net coupling between This YIG thin film into the field of information

SCI

English

NI Journal Papers

First ; Corresponding

Key-Area Research and Development Program of Guang Dong Province[2018B030326001] ; National Key Research and Development Program of China[2016YFA0300802] ; National Natural Science Foundation of China["11704022","U1801661","12104208"] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06D348] ; Science, Technology and Innovation Commission of Shenzhen Municipality[KYTDPT20181011104202253]

Optics ; Physics

Optics ; Physics, Atomic, Molecular & Chemical

WOS:000926760800005

AMER PHYSICAL SOC

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
3.Yancheng Inst Technol, Dept Phys, Yancheng 224051, Peoples R China
4.Beihang Univ, Fert Beijing Res Inst, Sch Elect & Informat Engn, BDBC, Beijing 100191, Peoples R China
5.Tianjin Univ, Ctr Joint Quantum Studies, Sch Sci, Tianjin 300350, Peoples R China
6.Tianjin Univ, Sch Sci, Dept Phys, Tianjin 300350, Peoples R China
7.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
8.Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China
9.Univ Chicago, Pritzker Sch Mol Engn, Chicago, IL 60637 USA

Yuan, Shaojie,Liu, Chuanpu,Chen, Jilei,et al. Spin-wave-based tunable coupler between superconducting flux qubits[J]. PHYSICAL REVIEW A,2023,107(1).

Yuan, Shaojie.,Liu, Chuanpu.,Chen, Jilei.,Liu, Song.,Lan, Jin.,...&Yu, Dapeng.(2023).Spin-wave-based tunable coupler between superconducting flux qubits.PHYSICAL REVIEW A,107(1).

Yuan, Shaojie,et al."Spin-wave-based tunable coupler between superconducting flux qubits".PHYSICAL REVIEW A 107.1(2023).