Quantum computing on magnetic racetracks with flying domain wall qubits

Abstract

Domain walls (DWs) on magnetic racetracks are at the core of the field of spintronics, providing a basic element for classical information processing. Here, we show that mobile DWs also provide a blueprint for large-scale quantum computers. Remarkably, these DW qubits showcase exceptional versatility, serving not only as stationary qubits, but also performing the role of solid-state flying qubits that can be shuttled in an ultrafast way. We estimate that the DW qubits are long-lived because they can be operated at sweet spots to reduce potential noise sources. Single-qubit gates are implemented by moving the DW, and two-qubit entangling gates exploit naturally emerging interactions between different DWs. These gates, sufficient for universal quantum computing, are fully compatible with current state-of-the-art experiments on racetrack memories. Further, we discuss possible strategies for qubit readout and initialization, paving the way toward future quantum computers based on mobile topological textures on magnetic racetracks.

14 pages, 7 figures

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Cited by in corpus (14)

• Nonreciprocal Photon-Phonon Entanglement in Kerr-Modified Spinning Cavity Magnomechanics
• Josephson transistor from the superconducting diode effect in domain wall and skyrmion magnetic racetracks
• High-fidelity spin qubit shuttling via large spin-orbit interaction
• Universal quantum computing based on magnetic domain wall qubits
• Density Matrix Renormalization Group Study of Domain Wall Qubits
• Topological Spin Textures Enabling Quantum Transmission
• Proposal for a nonadiabatic geometric gate with an Andreev spin qubit
• Memory effects on the current induced propagation of spin textures in NdCo${}_5$/Ni${}_8$Fe${}_2$ bilayers
• Topological transport of vorticity on curved magnetic membranes
• Tunable Ultrafast Dynamics of Antiferromagnetic Vortices in Nanoscale Dots
• Solitonic Andreev spin qubits from Andreev states in Corbino Josephson junctions
• Josephson-like magnetic tunnel junction -- transition from classical to quantum regime
• Robust Tripartite Entanglement Generation via Correlated Noise in Spin Qubits
• Macroscopic entanglement between localized domain walls inside a cavity