2 papers
quant-ph2026
Exact Matching-Polynomial Solution of the Periodic Baxter-Fendley Clock Chain
Yuguan Li, D. C. Liu, Murray T. Batchelor
The periodic non-Hermitian Baxter-Fendley clock chain has lacked a complete finite-size spectral solution, whereas its open-chain counterpart admits a solution in terms of in…
quant-ph2026
Exact Solution for Non-Hermitian Free Fermions: A Case Study of the XY Chain
Yuguan Li, D. C. Liu, Murray T. Batchelor
We consider the non-Hermitian XY spin chain with open boundary conditions when the anisotropy parameter is extended to complex values. By analyzing the quasi-Hamiltonian matrix, we…