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quant-ph2024
Fluctuation-Dissipation Theorem and Information Geometry in Open Quantum Systems
Jian-Hao Zhang, Cenke Xu, Yichen Xu
We propose a fluctuation-dissipation theorem in open quantum systems from an information-theoretic perspective. We define the fidelity susceptibility that measures the sensitivity…
quant-ph2024★ 1 cited
Strong-to-weak spontaneous breaking of 1-form symmetry and intrinsically mixed topological order
Carolyn Zhang, Yichen Xu, Jian-Hao Zhang +3
Topological orders in 2+1d are spontaneous symmetry-breaking (SSB) phases of 1-form symmetries in pure states. The notion of symmetry is further enriched in the context of mixed st…