An r-ary symmetric channel has as transition probability matrix the r×r matrix qxy = p if x ≠ y and qxy = 1 - (r - 1)p = q if x = y. Given a set Y of r symbols, the code here consists of r codewords, ...

Quantum data are susceptible to decoherence induced by the environment and to errors in the hardware processing it. A future fault-tolerant quantum computer will use ...

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Amazon has unveiled its first quantum computing chip that uses scalable architecture and reduces error correction cost by up ...