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quant-ph2026
Geometric modulation of transition and survival intensities in non-Hermitian systems
Ryu Frieson, Takashi Oka, Hideaki Obuse
The time evolution of non-Hermitian systems is generally nonunitary. Dynamics governed by time-dependent non-Hermitian Hamiltonians lead to a variety of novel phenomena, one of whi…
quant-ph2026
Quantum walk with a local spin interaction
Manami Yamagishi, Naomichi Hatano, Kohei Kawabata +4
We introduce a model of quantum walkers interacting with a magnetic impurity localized at the origin. First, we study a model of a single quantum walker interacting with a localize…
quant-ph2025
Topological transition between gapless phases in quantum walks
Ranjith R Kumar, Hideaki Obuse
Topological gapless phases of matter have been a recent interest among theoretical and experimental condensed matter physicists. Fermionic chains with extended nearest neighbor cou…