170 citations · 1.4k across the 43 of their papers we have counts for
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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…
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…
Observation of nonlinear variations in three-vertex geometric phase in two-photon polarization qutrit
Kazuhisa Ogawa, Shuhei Tamate, Hirokazu Kobayashi +2
We experimentally observed nonlinear variations in the three-vertex geometric phase in a two- photon polarization qutrit. The three-vertex geometric phase is defined by three quant…
Classical Realization of Dispersion Cancellation by Time-Reversal Method
Kazuhisa Ogawa, Shuhei Tamate, Toshihiro Nakanishi +2
We propose a classical optical interferometry scheme that reproduces dispersion-insensitive Hong-Ou-Mandel interferograms. The interferometric scheme is derived from a systematic m…
Time-reversed two-photon interferometry for phase super-resolution
Kazuhisa Ogawa, Shuhei Tamate, Hirokazu Kobayashi +2
We observed two-photon phase super-resolution in an unbalanced Michelson interferometer with classical Gaussian laser pulses. Our work is a time-reversed version of a two-photon in…
Weak measurements with completely mixed probe states
Shuhei Tamate, Toshihiro Nakanishi, Masao Kitano
Weak measurements with mixed probe states were investigated in the presence of noise in the probe system. We show that the completely mixed state can be used as a probe state for w…