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This study investigates quantum localization phenomena in non-Hermitian quasicrystalline systems featuring disordered imaginary gauge fields. The researchers demonstrate that these systems exhibit anomalous localization behavior and mobility edges—energy thresholds separating localized and extended quantum states—which differ from conventional Anderson localization in standard quasicrystals. Through theoretical analysis and numerical simulations, they show how the interplay between quasiperiodic potentials and imaginary disorder creates unique transport properties not found in Hermitian systems.
Why it matters
Understanding localization in non-Hermitian systems could advance quantum technologies including topological lasers, optical devices with engineered gain and loss, and quantum sensors. The discovery of unconventional mobility edges may enable precise control of wave propagation in photonic and quantum materials.
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