Optimizing Rydberg Gates for Logical-Qubit Performance

Sven Jandura, Jeff D. Thompson, Guido Pupillo

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Robust gate sequences are widely used to reduce the sensitivity of gate operations to experimental imperfections. Typically, the optimization minimizes the average gate error; however, recent work in quantum error correction has demonstrated that the performance of encoded logical qubits is sensitive to not only the average error rate but also the type of errors that occur. Here, we present a family of Rydberg-blockade gates for neutral-atom qubits that are robust against two common major imperfections: intensity inhomogeneity and Doppler shifts. These gates outperform existing gates for moderate or large imperfections. We also consider the logical performance of these gates in the context of an erasure-biased qubit based on metastable 171Yb. In this case, we observe that the robust gates outperform existing gates for even very small values of the imperfections, because they maintain the native large bias toward erasure errors for these qubits. These results significantly reduce the laser stability and atomic temperature requirements to achieve fault-tolerant quantum computing with neutral atoms. The approach of optimizing gates for logical-qubit performance may be applied to other qubit platforms.

Original languageEnglish (US)
Article number020336
JournalPRX Quantum
Volume4
Issue number2
DOIs
StatePublished - Apr 2023

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Computer Science
  • Mathematical Physics
  • General Physics and Astronomy
  • Applied Mathematics
  • Electrical and Electronic Engineering

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