394 citations · 1.5k across the 42 of their papers we have counts for
42 papers
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…
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…
Tracking Quantum Error Correction
Kosuke Fukui, Akihisa Tomita, Atsushi Okamoto
To implement fault-tolerant quantum computation with continuous variables, the Gottesman--Kitaev--Preskill (GKP) qubit has been recognized as an important technological element. We…
Quantum key distribution with an efficient countermeasure against correlated intensity fluctuations in optical pulses
Ken-ichiro Yoshino, Mikio Fujiwara, Kensuke Nakata +7
Quantum key distribution (QKD) allows two distant parties to share secret keys with the proven security even in the presence of an eavesdropper with unbounded computational power.…