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quant-ph2026
Symmetrized Block-Product Periodic Marginals in Infinite Translation-Invariant Quantum Chains
Xiao Zeng, Kaiyan Yang, Lingxia Zhang +1
We study local marginals in one-dimensional translation-invariant quantum systems that may hide finite-period structure. Given an -site reduced density matrix, we ask whether it…
quant-ph2026
Contextuality as a Diagnostic of Translation-Symmetry Breaking in Translation-Invariant 1D Hamiltonians
Xiao Zeng, Kaiyan Yang, Lingxia Zhang +1
Bell- and contextuality-type inequalities have become practical probes of many-body quantum correlations, often involving only few-body correlators and quantities with a direct Ham…
quant-ph2026
Local-Observable-Guided Generative Quantum Circuits for Degenerate Ground Spaces
Yiying Chen, Lingxia Zhang, Yanzheng Zhu +3
Searching for degenerate ground spaces in quantum many-body systems is central to understanding spontaneous symmetry breaking and topological order. Although existing numerical met…