Programme

P.35 -- Posters, VCTP-51

Date: Tuesday, 4 August 2026

Time: 09:30 - 10:30

Chiral Redistribution of Quantum Entanglement: Spectral Mechanisms and Delayed Correlation Transfer in a Rhombic Spin Network

Le Duc Vinh (1,2), Tran Cong Phong (1,2)

(1) Institute for Advanced Study in Technology, Ton Duc Thang University, Ho Chi Minh City, Viet Nam (2) Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Viet Nam

We investigate the dynamics of quantum entanglement in a rhombic spin-$1/2$ network with nearest-neighbor XY exchange, Dzyaloshinskii-Moriya (DM) interactions, and a diagonal cross coupling. Exploiting the symmetry of the single-excitation subspace, we obtain analytical expressions for the eigenstates and time-dependent wave amplitudes, which enable a detailed characterization of pairwise entanglement generation, redistribution, and propagation. The analysis reveals that the DM interaction does not simply enhance quantum correlations but reorganizes their distribution among competing channels. In particular, a pronounced suppression of the diagonal entanglement channel is accompanied by the activation of alternative pathways, leading to a redistribution of pairwise correlations across the network. This behavior is quantified through both the total negativity and a redistribution metric that measures the imbalance between dominant entanglement channels. Spectral analysis further shows that the strongest redistribution occurs near a level-crossing condition, where the eigenstate composition undergoes a significant rearrangement. Time-resolved cross-correlation analysis demonstrates characteristic delays between entanglement channels, indicating a sequential transfer of correlations through the network. These results identify a direct connection between spectral structure and correlation dynamics and suggest that chiral interactions provide an effective means of controlling the spatial and temporal organization of entanglement in finite spin systems.

Presenter: Tran Cong Phong