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quant-ph2019
Kitaev's quantum double model as an error correcting code
Shawn X. Cui, Dawei Ding, Xizhi Han +4
Kitaev's quantum double models in 2D provide some of the most commonly studied examples of topological quantum order. In particular, the ground space is thought to yield a quantum…
quant-ph2019
Entropy Bound for the Classical Capacity of a Quantum Channel Assisted by Classical Feedback
Dawei Ding, Yihui Quek, Peter W. Shor +1
We prove that the classical capacity of an arbitrary quantum channel assisted by a free classical feedback channel is bounded from above by the maximum average output entropy of th…