Fault-tolerant quantum computation versus Gaussian noise
Hui Khoon Ng, John Preskill
TL;DR
This paper investigates the robustness of fault-tolerant quantum computers under Gaussian non-Markovian noise, establishing a less restrictive threshold condition that enables scalable quantum computation despite high-frequency noise.
Contribution
It introduces a new threshold condition for Gaussian non-Markovian noise that is more tolerant to high-frequency noise than previous models.
Findings
Scalable quantum computation is feasible under the proposed threshold.
The threshold condition is less sensitive to high-frequency noise.
Quantum robustness improves with the new noise spectrum criteria.
Abstract
We study the robustness of a fault-tolerant quantum computer subject to Gaussian non-Markovian quantum noise, and we show that scalable quantum computation is possible if the noise power spectrum satisfies an appropriate "threshold condition." Our condition is less sensitive to very-high-frequency noise than previously derived threshold conditions for non-Markovian noise.
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