37 citations · 186 across the 22 of their papers we have counts for
8 papers · 1 filter
Quantum Geometric Bounds in Non-Hermitian Systems
Milosz Matraszek, Wojciech J. Jankowski, Jan Behrends
We identify quantum geometric bounds for observables in non-Hermitian systems. We find unique bounds on non-Hermitian quantum geometric tensors, generalized two-point response corr…
Orbital magnetization reveals multiband topology
Chun Wang Chau, Robert-Jan Slager, Wojciech J. Jankowski
We demonstrate that nontrivial multiband topological invariants of electronic wavefunctions can be revealed through orbital magnetization responses to external magnetic fields. We…
Nonlinear Odd Viscoelastic Effect
Ashwat Jain, Wojciech J. Jankowski, M. Mehraeen +1
We uncover a class of nonlinear odd viscoelastic effects in three spatial dimensions. We show that these dissipationless effects arise upon combining geometric distortions in two o…
Quantum Geometry of Altermagnetic Magnons Probed by Light
Rundong Yuan, Wojciech J. Jankowski, Ka Shen +1
Magnons with momentum-dependent chirality are a key signature of altermagnets. We identify bicircular light as a smoking-gun optical probe for chiral altermagnetic magnons, selecti…
Probing Tensor Monopoles and Gerbe Invariants in Three-Dimensional Topological Matter
Wojciech J. Jankowski, Robert-Jan Slager, Giandomenico Palumbo
We show that momentum-space tensor monopoles corresponding to nontrivial vector bundle generalizations, known as bundle gerbes, can be realized in bands of three-dimensional topolo…
Enhancing the Hyperpolarizability of Crystals with Quantum Geometry
Wojciech J. Jankowski, Robert-Jan Slager, Michele Pizzochero
We demonstrate that higher-order electric susceptibilities in crystals can be enhanced and understood through nontrivial topological invariants and quantum geometry, using one-dime…
Quantum geometric bounds in spinful systems with trivial band topology
Wojciech J. Jankowski, Robert-Jan Slager, Gunnar F. Lange
We derive quantum geometric bounds in spinful systems with spin topology characterized by a single index protected by a spin gap. Our bounds provide geometric conditio…
Optical signatures of Euler superconductors
Chun Wang Chau, Wojciech J. Jankowski, Robert-Jan Slager
We study optical manifestations of multigap band topology in multiband superconductors with a nontrivial topological Euler class. We introduce a set of lattice models for non-Abeli…