Robust qubit interactions mediated by photonic topological edge states

Gurevich, Boris; Xie, Weihua; Yarmohammadi, Mohsen; Kolodrubetz, Michael H.

doi:10.1103/w2w5-n3lp

Robust qubit interactions mediated by photonic topological edge states

Journal Article · Mon Jan 26 00:00:00 EST 2026 · Physical Review. B

DOI:https://doi.org/10.1103/w2w5-n3lp· OSTI ID:3024460

Gurevich, Boris ^[1]; Xie, Weihua ^[1]; Yarmohammadi, Mohsen ^[2]; ^[1]

Univ. of Texas at Dallas, Richardson, TX (United States)
Georgetown Univ., Washington, DC (United States)

Here, we investigate the coupling of two spatially separated qubits via topologically protected edge states in a two-dimensional Hofstadter lattice. In this hybrid platform, the qubits are coupled to distinct edge sites of the lattice, enabling long-range interactions mediated by topological edge modes. We solve the full system Hamiltonian and analyze the resulting eigenstate structure to uncover the conditions under which coherent qubit interactions emerge. Our analysis reveals that the effective coupling is highly sensitive to the qubit placement, energy detuning, and the topological character of the edge spectrum. We obtain an analytical solution that goes beyond the perturbative regime, capturing the full interplay between the qubits and edge modes. These results provide a foundation for exploring information transport and many-body effects in engineered quantum systems where interactions are mediated by topological edge modes.

View Accepted Manuscript (DOE)

Research Organization:: Georgetown Univ., Washington, DC (United States); Univ. of Texas at Dallas, Richardson, TX (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: FG02-08ER46542

Other Award/Contract Number:: DMR-1945529
MPS-2228725
PHY-1607611
AT-2036-20200401

OSTI ID:: 3024460

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 4 Vol. 113; ISSN 2469-9950; ISSN 2469-9969

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Robust qubit interactions mediated by photonic topological edge states Gurevich, Boris; Xie, Weihua; Yarmohammadi, Mohsen Zenodo https://doi.org/10.5281/zenodo.18302358	image	January 2026

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