Is error detection helpful on IBM 5Q chips ?

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This paper reports on experiments realized on several IBM 5Q chips which show evidence for the advantage of using error detection and fault-tolerant design of quantum circuits.

• We show an average improvement of the task of sampling from states that can be fault-tolerantly prepared in the $[[4,2,2]]$ code, when using a fault-tolerant technique well suited to the layout of the chip.
• By showing that fault-tolerant quantum computation is already within our reach, the author hopes to encourage this approach.