Exploring Parity Magnetic Effects through Experimental Simulation with Superconducting Qubits

• URL: http://arxiv.org/abs/2308.11115v1
• Date: Tue, 22 Aug 2023 01:39:05 GMT
• Title: Exploring Parity Magnetic Effects through Experimental Simulation with Superconducting Qubits
• Authors: Yu Zhang, Yan-Qing Zhu, Jianwen Xu, Wen Zheng, Dong Lan, Giandomenico Palumbo, Nathan Goldman, Shi-Liang Zhu, Xinsheng Tan, Z.D.Wang, Yang Yu
• Abstract summary: We present the successful realization of four-dimensional (4D) semimetal bands featuring tensor monopoles, achieved using superconducting quantum circuits. Our work lays the foundation for further investigations into higher-dimensional topological states of matter.
• Score: 12.182114027512792
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: We present the successful realization of four-dimensional (4D) semimetal bands featuring tensor monopoles, achieved using superconducting quantum circuits. Our experiment involves the creation of a highly tunable diamond energy diagram with four coupled transmons, and the parametric modulation of their tunable couplers, effectively mapping momentum space to parameter space. This approach enables us to establish a 4D Dirac-like Hamiltonian with fourfold degenerate points. Moreover, we manipulate the energy of tensor monopoles by introducing an additional pump microwave field, generating effective magnetic and pseudo-electric fields and simulating topological parity magnetic effects emerging from the parity anomaly. Utilizing non-adiabatic response methods, we measure the fractional second Chern number for a Dirac valley with a varying mass term, signifying a nontrivial topological phase transition connected to a 5D Yang monopole. Our work lays the foundation for further investigations into higher-dimensional topological states of matter and enriches our comprehension of topological phenomena.

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