James Wootton

James Wootton114

Dec 29 2017 02:00 UTC
The Decodoku project seeks to let users get hands-on with cutting-edge quantum research through a set of simple puzzle games. The design of these games is explicitly based on the problem of decoding qudit variants of surface codes. This problem is presented such that it can be tackled by players with no prior knowledge of quantum information theory, or any other high-level physics or mathematics. Methods devised by the players to solve the puzzles can then directly be incorporated into decoding algorithms for quantum computation. In this paper we give a brief overview of the novel decoding methods devised by players, and provide short postmortem for Decodoku v1.0-v4.1.
Dec 20 2017 08:41 UTC
Dec 18 2017 11:29 UTC
Dec 15 2017 08:13 UTC
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Oct 11 2017 07:46 UTC
Sep 21 2017 13:51 UTC
Sep 21 2017 05:41 UTC

What does this imply for https://scirate.com/arxiv/1608.00263? I'm guessing they still regard it as valid (it is ref [14]), but just too hard to implement for now.

Sep 21 2017 05:28 UTC
Sep 20 2017 05:09 UTC
Sep 13 2017 05:09 UTC
Sep 08 2017 07:21 UTC
Sep 05 2017 02:00 UTC
James Wootton published A repetition code of 15 qubits
The repetition code is an important primitive for the techniques of quantum error correction. Here we implement repetition codes of at most $15$ qubits on the $16$ qubit \emphibmqx3 device. Each experiment is run for a single round of syndrome measurements, achieved using the standard quantum technique of using ancilla qubits and controlled operations. The size of the final syndrome is small enough to allow for lookup table decoding using experimentally obtained data. The results show strong evidence that the logical error rate decays exponentially with code distance, as is expected and required for the development of fault-tolerant quantum computers. The results also give insight into the nature of noise in the device.
Aug 30 2017 05:51 UTC

Seems so obvious now you say it! Well done for trying this out.

Do you know how the results compare to Wen style stabilizers, where both plaquette and vertex stabilizers alternate between two Paulis? I guess using Y and Z would be best for biased noise, given your results.

Aug 30 2017 05:45 UTC