Magic-state distillation with the four-qubit code

Details Magic-state distillation with the four-qubit code Magic-state distillation with the four-qubit code

2012-04-18

arxiv.org/abs/1204.4221v1

Physics

Quantum Physics

10 pages, 8 figures, 1 table

Scientific paper

The distillation of magic states is an often-cited technique for enabling universal quantum computing once the error probability for a special subset of gates has been made negligible by other means. We present a routine for magic-state distillation that reduces the required overhead for a range of parameters of practical interest. Each iteration of the routine uses a four-qubit error-detecting code to distill the +1 eigenstate of the Hadamard gate at a cost of ten input states per two improved output states. Use of this routine in combination with the 15-to-1 distillation routine described by Bravyi and Kitaev allows for further improvements in overhead.

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