Towards realization of quantum communications
In digital information systems, which are the basis of our present information technologies, 0 is always and forever 0, and 1 is always and forever 1 unless they are changed from outside. However, in the world of atomic scale, a signal that can be 0 and 1 simultaneously can be created. At the end of the 20th Century, tools were developed for directly controlling phenomena on an atomic scale. For example, a state can be created in which two molecules are shared between two parities over several tens of kilometers apart. Quantum mechanical phenomena that appeared paradoxical, are now being directly proved in experiments. Such phenomena of quantum mechanics are now applicable to new information technologies, which are incomparable with conventional technologies. Quantum mechanics is now closely related to the central concepts of information.
We aim to developing theories for processing signals at the quantum level that can be in 0 and 1 simultaneously, and also to developing technologies of implementing theoretical predictions in quantum optical domain.
Single photon emission with controlled waveform demonstrated for the first time
Nonclassical light successfully emitted from an optical parametric oscillator pumped by a frequency-doubled diode laser
