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Beyond Calabrese-Cardy Scaling: Exceptional-Point Sensitivity from the de Sitter RT Surface
Kuang-Hung Chou
Entanglement entropy at one-dimensional criticality typically follows the Calabrese-Cardy scaling. In non-Hermitian critical chains near exceptional points, however, we show that t…
Emergent de Sitter Space and Non-Unitary Tensor Networks from Non-Hermitian Quantum Criticality
Kuang-Hung Chou, Po-Yao Chang
Extending the holographic principle to de Sitter (dS) spacetimes remains one of the most vital open frontiers in quantum gravity, where a microscopic, bottom-up tensor-network fram…
PT symmetry-enriched non-unitary criticality
Kuang-Hung Chou, Xue-Jia Yu, Po-Yao Chang
The interplay between topology and quantum criticality has given rise to the notion of symmetry-enriched criticality, which has attracted considerable attention in recent years. In…
Impurity-induced non-unitary criticality
Heng-Hsi Li, Kuang-Hung Chou, Xueda Wen +1
Quantum impurities give rise to rich physical phenomena, with some exhibiting critical behavior described by conformal field theories (CFTs) in the low-energy limit. In parallel, p…