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The new detector is made of 32 niobium nitride superconducting nanowires on a silicon chip, which enables high count rates with high precision. Credit: Ryan Lannom, JPL-Caltech/NASA
Typically, quantum information being transmitted is set to a clock, with each piece of information encoded into one photon and sent on a tick. How precisely you can measure the arrival time of the photons at the receiver determines how close together the ticks can be without making a mistake, and therefore it determines how quickly you can send the information. The new detector makes it practical to perform quantum communication with a state-of-the-art clock frequency of 10-GHz.
The researchers are still working to make improvements to the PEACOQ detector, which is currently about 80% efficient — meaning 20% of photons that hit the detector are not measured. They also plan to build a portable receiver unit that can be used for quantum communication experiments. It will contain several PEACOQ detectors along with optics, readout electronics and a cryostat.
Reference: “High-speed detection of 1550 nm single photons with superconducting nanowire detectors” by I. Craiciu, B. Korzh, A. D. Beyer, A. Mueller, J. P. Allmaras, L. Narvaez, M. Spiropulu, B. Bumble, T. Lehner, E. E. Wollman and M. D. Shaw, 2023, Optica.
DOI: 10.1364/OPTICA.478960
Original Text (This is the original text for your reference.)
The new detector is made of 32 niobium nitride superconducting nanowires on a silicon chip, which enables high count rates with high precision. Credit: Ryan Lannom, JPL-Caltech/NASA
Typically, quantum information being transmitted is set to a clock, with each piece of information encoded into one photon and sent on a tick. How precisely you can measure the arrival time of the photons at the receiver determines how close together the ticks can be without making a mistake, and therefore it determines how quickly you can send the information. The new detector makes it practical to perform quantum communication with a state-of-the-art clock frequency of 10-GHz.
The researchers are still working to make improvements to the PEACOQ detector, which is currently about 80% efficient — meaning 20% of photons that hit the detector are not measured. They also plan to build a portable receiver unit that can be used for quantum communication experiments. It will contain several PEACOQ detectors along with optics, readout electronics and a cryostat.
Reference: “High-speed detection of 1550 nm single photons with superconducting nanowire detectors” by I. Craiciu, B. Korzh, A. D. Beyer, A. Mueller, J. P. Allmaras, L. Narvaez, M. Spiropulu, B. Bumble, T. Lehner, E. E. Wollman and M. D. Shaw, 2023, Optica.
DOI: 10.1364/OPTICA.478960
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