Takahashi, Hiroki, Wakui, Kentaro, Suzuki, Shigenari, Takeoka, Masahiro, Hayasaka, Kazuhiro, Furusawa, Akira, ...
We propose and demonstrate a novel method to generate a large-amplitude coherent-state superposition (CSS) via ancilla-assisted photon-subtraction. The ancillary mode induces quantum interference of...
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...
Long-term stability of continuous-wave emission from an ion-cavity system (2005)
Keller,Matthias, Lange,Birgit, Hayasaka,Kazuhiro, Lange,Wolfgang, Walther,Herbert
Long-term stability of continuous-wave emission from an ion-cavity system (2005)
Keller, Matthias, Lange, Birgit, Hayasaka, Kazuhiro, Lange, Wolfgang, Walther, Herbert
Continuous generation of single photons with controlled waveform in an ion-trap cavity system (2004)
Keller,Matthias, Lange,Birgit, Hayasaka,Kazuhiro, Lange,Wolfgang, Walther,Herbert
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...
Continuous generation of single photons with controlled waveform in an ion-trap cavity system (2004)
Keller, Matthias, Lange, Birgit, Hayasaka, Kazuhiro, Lange, Wolfgang, Walther, Herbert
Quantum Information Processing with Ions Deterministically Coupled to an Optical Cavity (2003)
Keller,Matthias, Lange,Birgit, Hayasaka,Kazuhiro, Lange,Wolfgang, Walther,Herbert
Quantum Information Processing with Ions Deterministically Coupled to an Optical Cavity (2003)
Keller, Matthias, Lange, Birgit, Hayasaka, Kazuhiro, Lange, Wolfgang, Walther, Herbert