3 papers
quant-ph2026
Spectral design principles for local-excitation retention in impurity-assisted atomic arrays
Junpei Oba
Enhanced local-excitation retention in atomic arrays allows to exploit cooperative radiative effects to suppress emission and prolong excited-state lifetimes. We consider an impuri…
quant-ph2025
Model-based framework for automated quantification of error sources in quantum state tomography
Junpei Oba, Hsin-Pin Lo, Yasuhiro Yamada +6
High-quality quantum state generation is essential for advanced quantum information processing, including quantum communication, quantum sensing, and quantum computing. In practice…
physics.optics2025
Inverse design of dual-band valley-Hall topological photonic crystals with arbitrary pseudospin states
Yuki Sato, Shrinathan Esaki Muthu Pandara Kone, Junpei Oba +1
Valley photonic crystals (VPCs) offer topological kink states that ensure robust, unidirectional, and backscattering-immune light propagation. The design of VPCs is typically based…