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- W2891434849 abstract "Bipartite fluctuations can provide interesting information about entanglement properties and correlations in many-body quantum systems. We address such fluctuations in relation with the topology of Dirac and Weyl quantum systems, in situations where the relevant particle number is not conserved, leading to additional volume laws scaling with the quantum Fisher information. In the case of the $p+ip$ superconductor, we build a relation between charge fluctuations and the associated winding numbers of Dirac cones in the low-energy sector. Topological aspects of the Hamiltonian in the vicinity of these points induce long-range entanglement in real space. We specifically extract analytical expressions for the corner contributions to bipartite fluctuations. We highlight their differences and similarities with the corner functions of the entanglement entropy which characterize the underlying conformal field theory. We provide a detailed analysis of such fluctuation properties, including the role of gap anisotropy, and discuss higher-dimensional Weyl analogs." @default.
- W2891434849 created "2018-09-27" @default.
- W2891434849 creator A5003664373 @default.
- W2891434849 creator A5046471767 @default.
- W2891434849 creator A5076132749 @default.
- W2891434849 date "2019-02-19" @default.
- W2891434849 modified "2023-10-09" @default.
- W2891434849 title "Bipartite fluctuations and topology of Dirac and Weyl systems" @default.
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