79 citations · 192 across the 6 of their papers we have counts for
6 papers
Projective measurement onto arbitrary superposition of coherent state bases
Shuro Izumi, Masahiro Takeoka, Kentaro Wakui +3
One of the peculiar features in quantum mechanics is that a superposition of macroscopically distinct states can exits. In optical system, this is highlighted by a superposition of…
Optical phase estimation via coherent state and displaced photon counting
Shuro Izumi, Masahiro Takeoka, Kentaro Wakui +3
We consider the phase sensing via weak optical coherent state at quantum limit precision. A new detection scheme for the phase estimation is proposed which is inspired by the subop…
Ultrabroadband direct detection of nonclassical photon statistics at telecom wavelength
Kentaro Wakui, Yujiro Eto, Hugo Benichi +7
Broadband light sources play essential roles in diverse fields, such as high-capacity optical communications, optical coherence tomography, optical spectroscopy, and spectrograph c…
Quantum receivers with squeezing and photon-number-resolving detectors
Shuro Izumi, Masahiro Takeoka, Kazuhiro Ema +1
We propose quantum receivers with optical squeezing and photon-number-resolving detector (PNRD) for the near-optimal discrimination of quaternary phase-shift-keyed coherent state s…
Displacement receiver for phase-shift-keyed coherent states
Shuro Izumi, Masahiro Takeoka, Mikio Fujiwara +4
Quantum receiver is an important tool for overcoming the standard quantum limit (SQL) of discrimination errors in optical communication. We theoretically study the quantum receiver…
Transient differential reflectivity of ferromagnetic and paramagnetic phases in the bilayered manganite La1.24Sr1.76Mn2O7
Y. Hirobe, Y. Kubo, K. Kouyama +3
Photoinduced effects in a single crystal of bilayered manganites, La2-2xSr1+2xMn2O7 (x=0.38), were investigated in a wide range of temperatures by pump-probe measurement at a photo…