Perspective: Quantum Computing on Magnetic Racetrack
Ji Zou, Jelena Klinovaja, Daniel Loss
TLDR
This perspective explores magnetic domain walls as a promising platform for scalable quantum computing, leveraging their high mobility for both stationary and flying qubits.
Key contributions
- Outlines essential ingredients and requirements for universal quantum computation using magnetic domain walls.
- Highlights promising material platforms and identifies crucial experiments needed to advance the concept.
- Discusses challenges and new opportunities at the interface of magnetism and quantum information science.
- Proposes magnetic domain walls as both stationary and flying qubits, offering potential advantages over current platforms.
Why it matters
This paper provides a comprehensive overview of using magnetic domain walls for quantum computing, a novel approach with potential for scalability. It identifies key challenges and opportunities, guiding future research in this interdisciplinary field.
Original Abstract
Magnetic domain walls have long been pursued as carriers of classical information for storage and processing. With the ability to create, control, and probe domain walls at the nanoscale, they are recently recognized as an ideal platform for studying macroscopic quantum effects and provide a natural blueprint for building scalable quantum computing architectures. In particular, the experimentally demonstrated high mobility of domain walls makes them not only suitable as stationary qubits but also as flying qubits, which may offer advantages over currently explored quantum computing platforms. In this Perspective, we outline our current understanding of the essential ingredients and key requirements for realizing universal quantum computation based on magnetic domain walls. We highlight promising concrete material platforms and identify the experiments that are still needed to advance this concept. We also discuss the potential challenges and point to new opportunities in this emerging research direction at the interface between magnetism and quantum information science.
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