Journal
PHYSICAL REVIEW X
Volume 12, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.12.021049
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Funding
- Center for Ultracold Atoms
- National Science Foundation
- U.S. Department of Energy [DE-SC0021013]
- ARO
- MURI
- DARPA ONISQ program
- QuEra Computing
- Amazon Web Services
- Alfred Spector and Rhonda Kost Fellowship of the Hertz Foundation
- Paul and Daisy Soros Fellowship
- Department of Defense through the National Defense Science and Engineering Graduate Fellowship Program
- NSF Graduate Research Fellowship Program [DGE1745303]
- Susan and Richard Miles Fellowship of the Hertz Foundation
- U.S. Department of Energy (DOE) [DE-SC0021013] Funding Source: U.S. Department of Energy (DOE)
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Researchers have characterized the sources of errors in neutral-atom quantum computers and proposed hardware-efficient, fault-tolerant quantum computation schemes to mitigate them. They have developed a novel and efficient method to address the most important errors, significantly reducing the resource cost for fault-tolerant quantum computation. These protocols can be implemented on state-of-the-art neutral-atom platforms.
Neutral-atom arrays have recently emerged as a promising platform for quantum information processing. One important remaining roadblock for the large-scale application of these systems is the ability to perform error-corrected quantum operations. To entangle the qubits in these systems, atoms are typically excited to Rydberg states, which could decay or give rise to various correlated errors that cannot be addressed directly through traditional methods of fault-tolerant quantum computation. In this work, we provide the first complete characterization of these sources of error in a neutral-atom quantum computer and propose hardware-efficient, fault-tolerant quantum computation schemes that mitigate them. Notably, we develop a novel and distinctly efficient method to address the most important errors associated with the decay of atomic qubits to states outside of the computational subspace. These advances allow us to significantly reduce the resource cost for fault-tolerant quantum computation compared to existing, general-purpose schemes. Our protocols can be implemented in the near term using state-of-the-art neutral-atom platforms with qubits encoded in both alkali and alkaline-earth atoms.
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