Liang, Y., Huang, W., Zhang, L., Tao, Z., Tang, K., Chu, J., Qiu, J., Sun, X., Zhou, Y., Zhang, J., Zhang, J., Guo, W., Liu, Y., Chen, Y., Liu, S., Zhong, Y., Niu, J., & Yu, D. (2024). Floquet Engineering of Anisotropic Transverse Interactions in Superconducting Qubits. arXiv, [2410.10208].
This study aims to overcome the limitation of isotropic transverse interactions in superconducting transmon qubits and demonstrate a scalable method for generating and calibrating anisotropic transverse interactions for simulating complex quantum systems.
The researchers used a one-dimensional array of six transmon qubits connected by tunable couplers. By applying simultaneous blue and red sideband drives to the couplers, they implemented pairing (XX-YY) and hopping (XX+YY) interactions, achieving independent control over XX and YY terms. The tunability and coherence of these engineered interactions were confirmed through Aharonov-Bohm interference in synthetic space. The team then simulated the transverse field Ising chain (TFIC) model and observed its dynamical phase transition by varying the external field.
This work demonstrates a scalable strategy for generating and calibrating anisotropic transverse interactions in superconducting qubits. This capability significantly expands the potential of superconducting qubit platforms for quantum simulation, enabling the study of complex quantum systems requiring spatially dependent interactions, including those with non-Abelian excitations.
This research provides a significant advancement in the field of quantum simulation using superconducting qubits. By enabling the engineering of anisotropic transverse interactions, the study opens up possibilities for exploring a wider range of quantum models and exotic phases of matter, including those relevant to topological quantum computation.
While the current demonstration is limited to a one-dimensional chain of six qubits, the researchers suggest that extending this approach to two-dimensional qubit arrays is feasible with current fabrication technologies. This would enable the study of even more complex models like the Kitaev model on honeycomb lattices, which hosts non-Abelian anyonic excitations.
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by Yongqi Liang... at arxiv.org 10-15-2024
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