4 papers
Wigner functions, negativity volumes, and experimental generation of Pegg-Barnett phase-operator eigenstates
Hiroo Azuma
In this paper, we study the non-Gaussianity of the eigenstates of the Pegg-Barnett phase observable. By computing the Wigner functions of the eigenstates, we confirm that they take…
Application and quantum properties of superpositions of oppositely squeezed states
Hiroo Azuma, William J. Munro, Kae Nemoto
We show that superpositions of oppositely squeezed states -- non-Gaussian Schr{ö}dinger-cat-like states -- exhibit enhanced nonclassical features and provide an entanglement advant…
Quantum phase transitions in the multiphoton Jaynes-Cummings-Hubbard model
Hiroo Azuma, William J. Munro, Kae Nemoto
We explore quantum phase transitions in the multiphoton Jaynes-Cummings-Hubbard model (JCHM). Using the mean-field approximation, we demonstrate that the multiphoton JCHM exhibits…
A heralded single-photon source implemented with second-order nonlinear photonic crystals
Hiroo Azuma
We study implementing a heralded single-photon source with second-order nonlinear photonic crystals. Injecting pump and signal light beams into a one-dimensional photonic crystal c…