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Author

M. Abbasi

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2 papers indexed here

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Preprint Sep 2026

Ground-State Phase Diagram, Higher-Winding Topology, and Lifshitz Criticality in an Anisotropic Four-Spin XX Chain

We investigate the quantum critical and topological properties of a spin-$1/2$ XX chain with anisotropic four-spin cluster interactions in a transverse magnetic field. The interplay of exchange anisotropy, cluster interactions, and the external field produces a rich phase diagram with multiple gapped topological phases...

M. Abbasi, F. Valeh, S. Mahdavifar · 0 citations
Preprint Sep 2026

Fermi-Point Topology Determines Emergent Conformal Criticality in Extended Quantum Spin Chains

Quantum criticality in one-dimensional quantum systems is characterized by emergent conformal field theories (CFTs), whose central charge counts independent gapless degrees of freedom. Establishing a microscopic connection between this universal conformal structure and the momentum-space topology of the underlying quas...

M. Abbasi, S. Mahdavifar · 0 citations

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