3 citations · 7 across the 7 of their papers we have counts for
Showing quant-phShow all
3 papers · 1 filter
quant-ph2025
Geometric phase from encircling an exceptional point of a quantum resonance in the complex-scaling method
Okuto Morikawa, Shoya Ogawa, Soma Onoda
Non-Hermitian operators are now routinely used to describe few-mode systems such as optical resonators and superconducting qubits, and exceptional points (EPs) are defective spectr…
quant-ph2025★ 2 cited
Exact WKB method for radial Schrödinger equation
Okuto Morikawa, Shoya Ogawa
We revisit exact WKB quantization for radial Schrödinger problems from the modern resurgence perspective, with emphasis on how ``physically meaningful'' quantization paths should b…
quant-ph2025
On continuum and resonant spectra from exact WKB analysis
Okuto Morikawa, Shoya Ogawa
Resonance phenomena are central to many quantum systems, where resonant states are typically characterized by pole singularities of the S-matrix. In this work, we employ the comple…