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Researchers develop method for measuring qudits encoded in quantum frequency combs
Using existing experimental and computational resources, a multi-institutional team has developed an effective method for measuring high-dimensional qudits encoded in quantum frequency combs, a type of photon source, on a single optical chip.
Although the word "qudit" might look like a typo, this lesser-known cousin of the qubit, or quantum bit, can carry more information and is more resistant to noise — key qualities needed to improve the performance of quantum networks, quantum key distribution systems and, eventually, the quantum internet.
