Professor Akira Furusawa and his colleagues at the Graduate School of Engineering have developed, in collaboration with NTT, a broadband, high-performance quantum light source that will be essential for future general-purpose optical quantum computer chips. The resulting squeezed light has a bandwidth on the order of terahertz, which means that the distance between optical qubits passing through the waveguide can be reduced to about 300 μm, an achievement that could lead to the realization of optical quantum computation on optical chips.
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