{"paper":{"title":"The private classical capacity and quantum capacity of a quantum channel","arxiv_id":"quant-ph/0304127","primary_cat":"quant-ph","submitted_at":"2003-04-18T17:04:15+00:00","version_compiled":"v6"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13.0 on the question bank abstract-p1-20260923, exactly as returned. 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