High-Fidelity Magic-State Preparation with a Biased-Noise Architecture

Understand

Magic state distillation is a resource intensive subroutine that consumes noisy input states to produce high-fidelity resource states that are used to perform logical operations in practical quantum-computing architectures.

• The resource cost of magic state distillation can be reduced by improving the fidelity of the raw input states.
• To this end, we propose an initialization protocol that offers a quadratic improvement in the error rate of the input magic states in architectures with biased noise.
• This is achieved by preparing an error-detecting code which detects the dominant errors that occur during state preparation.