3 papers
quant-ph2026
Algebraic Characterization of Biphoton Spatial-Mode Entanglement in Higher-Order Laguerre--Gaussian-Pumped SPDC
Takumi Jinushi, Hirokazu Kobayashi
High-dimensional spatial entanglement generated via spontaneous parametric down-conversion (SPDC) provides a powerful resource for quantum information processing, yet its mode stru…
quant-ph2026
Quantum Gouy phase singularities in a propagating biphoton state
Takumi Jinushi, Hirokazu Kobayashi
Phase singularities are topological defects around which the phase winds by an integer multiple of . In entangled multiphoton states, they can emerge nonlocally in the joint wa…
physics.optics2024
Single-pixel edge enhancement of object via convolutional filtering with localized vortex phase
Jigme Zangpo, Hirokazu Kobayashi
Microscopy is an essential tool in imaging research, and the edge-enhanced microscope by using the vortex filter is of particular interest as an optical information processing that…