42 citations · 331 across the 21 of their papers we have counts for
21 papers
All-optical control of coherent perfect absorption via frequency conversion
Rikizo Ikuta, Hirokazu Kobayashi, Hiroki Takahashi
Coherent perfect absorption (CPA) extinguishes optical fields through interference and dissipation, but conventional implementations rely on material loss that is largely fixed aft…
Complex counterpart of variance in quantum measurements for pre- and post-selected systems
Kazuhisa Ogawa, Natsuki Abe, Hirokazu Kobayashi +1
The variance of an observable in a pre-selected quantum system, which is always real and non-negative, appears as an increase in the probe wave packet width in indirect measurement…
Direct measurement of ultrafast temporal wavefunctions
Kazuhisa Ogawa, Takumi Okazaki, Hirokazu Kobayashi +2
The large capacity and robustness of information encoding in the temporal mode of photons is important in quantum information processing, in which characterizing temporal quantum s…
Operational formulation of weak values without probe systems
Kazuhisa Ogawa, Hirokazu Kobayashi, Akihisa Tomita
Weak values are the fundamental values for observables in a pre- and post-selected system. Weak values are typically measured by weak measurement, in which weak values appear in th…
Integer Multiplier for Orbital Angular Momentum of Light using Circular-Sector Transformation
Satoru Takashima, Hirokazu Kobayashi, Katsushi Iwashita
This paper describes an integer multiplier for the orbital angular momentum (OAM) of light through the parallel implementation of multiple circular-sector transformations, whereby…
A framework for measuring weak values without weak interactions and its diagrammatic representation
Kazuhisa Ogawa, Osamu Yasuhiko, Hirokazu Kobayashi +2
Weak values are typically obtained experimentally by performing weak measurements, which involve weak interactions between the measured system and a probe. However, the determinati…