8 papers
Exciton Alchemy: Chern Excitons from Trivial Bands
Yoonseok Hwang, Henry Davenport, Frank Schindler
Exciton topology is commonly inherited from the topology of the underlying electronic bands. Recent theoretical work, however, has shown that the exciton Chern number can in genera…
Topology from Decoherence
Alexandre Chaduteau, Derek Lee, Frank Schindler +1
Decoherence is conventionally regarded as an obstacle to realizing topological quantum phases. This has motivated extensive efforts to suppress noise in candidate topological mater…
Anomalous suppression of quantum chaos between two integrable limits
Roopayan Ghosh, Henry Davenport, Frank Schindler
Level statistics in non-integrable quantum many-body systems with time reversal symmetry are expected to follow the Gaussian Orthogonal Ensemble (GOE), a hallmark of quantum chaos.…
Berry Curvature of Low-Energy Excitons in Rhombohedral Graphene
Henry Davenport, Frank Schindler, Johannes Knolle
We investigate low energy excitons in rhombohedral pentalayer graphene encapsulated by hexagonal boron nitride (hBN/R5G/hBN), focusing on the regime at the experimental twist angle…
Exciton Berryology
Henry Davenport, Johannes Knolle, Frank Schindler
In translationally invariant semiconductors that host exciton bound states, one can define an infinite number of possible exciton Berry connections. These correspond to the differe…
Lindbladian versus Postselected Non-Hermitian Topology
Alexandre Chaduteau, Derek K. K. Lee, Frank Schindler
The recent topological classification of non-Hermitian `Hamiltonians' is usually interpreted in terms of pure quantum states that decay or grow with time. However, many-body system…