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H.-P. Zhang

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Preprint Sep 2026

Exact phase diagram of the XXZ Heisenberg chain in a staggered magnetic field

We study the phase diagram of the spin-1/2 XXZ Heisenberg chain in a staggered magnetic field. An exact solution is obtained along the phase boundary, where the exchange anisotropy and the staggered-field strength satisfy an exact analytical relation, yielding a highly degenerate manifold of ground states with off-diag...

H.-P. Zhang, Z. Song · 0 citations

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