Conditional transfer of quantum correlation in the intensity of twin beams (2005)
Zhang, Yun, Hayasaka, Kazuhiro, Kasai, Katsuyuki
A conditional protocol of transferring quantum-correlation in continuous variable regime was experimentally demonstrated. The quantum-correlation in two pairs of twin beams, each characterized by...
Hayasaka, Kazuhiro, Zhang, Yun, Kasai, Katsuyuki
Quantum-correlated twin beams were generated from a triply resonant optical parametric oscillator with an a-cut KTP crystal pumped by a frequency-doubled diode laser. A total output of 5.1 mW was...
Single-beam noise characteristics of quantum correlated twin beams (2004)
Zhangx, Yun, Kasai, Katsuyuki, Hayasaka, Kazuhiro
We investigated the intensity noise spectra of the single beam of a pump-enhanced continuous-wave (cw) optical parametric oscillator (OPO), which was used to generate quantum correlated twin beams,...
Quantum channel using photon number correlated twin beams (2004)
Zhang, Yun, Kasai, Katsuyuki, Hayasaka, Kazuhiro
We report quantum communications channel using photon number correlated twin beams. The twin beams are generated from a nondegenerate optical parametric oscillator, and the photon number difference...