Noise tailoring for scalable quantum computation via randomized compiling

Quantum computers are poised to radically outperform their classical counterparts by manipulating coherent quantum systems. A realistic quantum computer will experience errors due to the environment and imperfect control. When these errors are even partially coherent, they present a major obstacle to performing robust computations. Here, we propose a method for introducing independent random single-qubit gates into the logical circuit in such a way that the effective logical circuit remains unchanged. We prove that this randomization tailors the noise into stochastic Pauli errors, which can dramatically reduce error rates while introducing little or no experimental overhead. Moreover, we prove that our…

• CI
  Canadian Institute for Advanced Research
• NS
  Natural Sciences and Engineering Research Council of Canada
• AR
  Army Research Office

  Award: W911NF-14-1-0103