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Quantum information theory

The bits don't add up

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A counterexample to the 'additivity question', the most celebrated open problem in the mathematical theory of quantum information, casts doubt on the possibility of finding a simple expression for the information capacity of a quantum channel.

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  1. Peter W. Shor is in the Department of Mathematics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. shor@math.mit.edu,

    Peter W. Shor

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  1. Peter W. Shor
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Shor, P. The bits don't add up. Nature Phys 5, 247–248 (2009). https://doi.org/10.1038/nphys1242

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