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Poster Session

Poster Session II

4:00 pm – 6:00 pm, Wednesday June 18 Session H00 Oregon Convention Center, Exhibit Hall E
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Interaction-induced Monopole-stretching and Finite Temperature Generalization of the Chern Number

Poster 108
Presenter: Tsz Chun Lau (The Chinese University of Hong Kong)
Authors: Xiaoyi Yang (Xi'an Jiaotong University), Ren Zhang (Xi'an Jiaotong University), Yangqian Yan (The Chinese University of Hong Kong)

Motivated by the experimental realization of probing the Chern number of superconducting qubits, this work studies the finite temperature generalization of the Chern number of two-components Bose spinors with on-site interaction. We study the topological properties of interacting Bose spinors, and generalize the concept of Chern number to the finite temperature regime. It is found that the mixed Chern number of the one-particle reduced density matrix is directly related to the visibility of the mixed geometric phase. This result holds for any two-components Bose spinors. Finally, we propose an interacting two-components Bose spinor with time-reversal symmetry, where the visibility could be measured, and the dynamical phase could be canceled, to directly extract the monopole charge. Our work paves the way for experimental validation of theoretical predictions regarding topological phenomena in quantum systems.

Funding acknowledgement

Hong Kong RGC Early Career Scheme (Grant No. 24308323)Guangdong Provincial Quantum Science Strategic Initiative GDZX2404004

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