85 citations · 352 across the 33 of their papers we have counts for
33 papers
Generation of a coherent squeezed like state defined with the Lie-Trotter product formula using a nonlinear photonic crystal
Hiroo Azuma
In this paper, we investigate how to generate coherent squeezed like light using a nonlinear photonic crystal. Because the photonic crystal reduces the group velocity of the incide…
Leggett-Garg inequalities with deformed Pegg-Barnett phase observables
Hiroo Azuma, William J. Munro, Kae Nemoto
We investigate the Leggett-Garg inequalities (LGIs) for a boson system whose observables are given by deforming the Pegg-Barnett phase operators. We consider two observables and sh…
A simplified Mølmer-Sørensen gate for the trapped ion quantum computer
Hiroo Azuma
We discuss how to simplify the Molmer-Sorensen (MS) gate which is used for the trapped ion quantum computer. The original MS gate is implemented by illuminating two ions with bichr…
Generation of entangled photons with a second-order nonlinear photonic crystal and a beam splitter
Hiroo Azuma
We discuss the generation of entangled photons using a nonlinear photonic crystal and beam splitter. In our method, the photonic crystal is assumed to be composed of a material wit…
Violations of the Leggett-Garg inequality for coherent and cat states
Hiroo Azuma, Masashi Ban
We show that in some cases the coherent state can have a larger violation of the Leggett-Garg inequality (LGI) than the cat state by numerical calculations. To achieve this result,…
Noise reduction caused by eavesdropping on six-state quantum key distribution over collective-noise channel
Hiroo Azuma
In this paper, we show that there are instances where eavesdropping causes noise reduction for a quantum key distribution (QKD) protocol. To witness these phenomena, we investigate…