2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011 1 2011年 [査読有り]
Quadrature-squeezed light generated via parametric amplification is an essential resource for continuous-variable quantum communication (CVQC) technology, such as quantum teleportation and dense coding [1], and parametric amplification itself is a...
QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING (QCMC) 1110 197-+ 2009年 [査読有り]
We report on a measurement of entanglement in the time domain. The entanglement is examined by the Duan-Simon criteria. We obtained Duan-Simon criteria of Delta(2)(x(1) - x(2)) + Delta(2)(p(1) + p(2)) = 1.4 < 2 without optimal gain and Delta(2)...
Yujiro Eto   Akihiro Nonaka   Yun Zhang   Takuya Hirano   
QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING (QCMC) 1110 181-+ 2009年 [査読有り]
We report on the generation of quadrature entangled light pulses at the telecommunication wavelength of 1.535 mu m by combining two squeezed pulses. The quadrature phase amplitudes of the entangled light pulses are measured by using two time-domai...
QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING (QCMC) 1110(1) 169-+ 2009年 [査読有り]
We report a pulsed homodyne detector that operates in the time domain and can measure individual pulses at a repetition rate of 76 MHz. The individuality of the measurement is interrogated by correlation coefficient between adjacent pulses. The ho...