Keun-young Kim A

Quantum chaos diagnostics for non-Hermitian systems from bi-Lanczos Krylov dynamics

In Hermitian systems, Krylov complexity has emerged as a powerful diagnostic of quantum dynamics, capable of distinguishing chaotic from integrable phases, in agreement with established probes such as spectral statistics and out-of-time-order correlators. By contrast, its role in...

Islands and traversable wormholes

A bstract We study information recovery in black hole evaporation using traversable wormhole protocols in AdS 2 Jackiw-Teitelboim gravity with matter fields coupled to an external bath. By introducing a simple non-local interaction between left and right radiation regions, we gen...