A static lattice achieves Chern insulator properties through synergy of on-site loss and non-reciprocal coupling—neither alone suffices. This opens topological phases in open systems without external fields.

A static lattice achieves Chern insulator properties through synergy of on-site loss and non-reciprocal coupling—neither alone suffices. This opens topological phases in open systems without external fields.
New mapping connects two non-Hermitian system families through Lanczos transformation, revealing how asymmetric couplings relate to gain-loss mechanisms with applications to quantum control and exceptional point physics.
Novel variational technique successfully extends non-perturbative computational methods to negative-coupling quantum field theories, enabling precision calculations of PT-symmetric systems on lattices with applications to Higgs physics.
Researchers observe self-sustained limit-cycle oscillations in coupled photon condensates driven purely by dissipative interactions, demonstrating that non-Hermitian dynamics can organize complex many-body behavior without conservative nonlinearities.