Ten-channel photonic interface links neutral-atom qubits in parallel
A research group in Japan has demonstrated a world-record 10-channel multiplexed quantum photonic interface based on an integrated waveguide array, a key technology for optically interconnecting multiple quantum computers. The study is published in the journal Optica.
A Japanese research team led by Professor Takashi Yamamoto from the University of Osaka has developed a world-record 10-channel multiplexed quantum photonic interface based on an integrated waveguide array. This technology enables the parallel connection of multiple quantum computers, a crucial step toward fault-tolerant universal quantum computing.
The study, published in Optica, showcases the potential for scaling up to approximately 100 parallel channels, which is essential for large-scale quantum computing architectures. The interface successfully coupled photons emitted from neutral-atom arrays into 10 parallel channels of a 32-channel waveguide, transmitted through optical fibers, and detected in parallel using a multichannel superconducting nanostrip photon detector system.
The research overcame previous limitations of insufficient integration density and wide atom spacing, demonstrating negligible interchannel crosstalk and atom-photon polarization correlations. This breakthrough brings us closer to creating networked quantum computers that can operate together as a single system, paving the way for more advanced quantum technologies.
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