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날짜 2023-06-26 11:00 
일시 June 26(Mon), 11:00AM 
장소 E6, Rm#1323 
연사 Dr. Ji Zou (Department of Physics , University of Basel) 
Dr. Ji Zou(University of Basel) 모시고 'Quantum computing on magnetic racetracks with flying domain wall qubits ' 주제에 대한 세미나를 개최합니다. 많은 참여 부탁드립니다.
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1) Time
    - at 11:00 on June 26, 2023 
 
2) Venue
    - E6, Rm#1323
 
3) Speaker
    - Dr. Ji Zou (Department of Physics , University of Basel)
 
4) Talk Title
    - Quantum computing on magnetic racetracks with flying domain wall qubits
 
5) Abstract
    -  Domain walls (DWs) on magnetic racetracks are at the core of the field of spintronics, providing a basic element for classical information processing [1]. Here, we show that mobile DWs also provide a blueprint for large-scale quantum computers [2]. Remarkably, these DW qubits showcase exceptional versatility, serving not only as stationary qubits, but also performing the role of solid-state flying qubits. We estimate that our DW qubits are long-lived because they can be operated at sweet spots to reduce potential noise sources. Single-qubit gates are deftly 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.
 
[1] S. S. P. Parkin, M. Hayashi, L. Thomas, Magnetic domain-wall racetrack memory, Science 320, 190–194 (2008);
[2] J. Zou, S. Bosco, B. Pal, S. S. P. Parkin, J. Klinovaja, D. Loss, Domain wall qubits on magnetic racetracks, arXiv:2212.12019
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