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@ARTICLE{Struck:1023792,
      author       = {Struck, Tom and Volmer, Mats and Visser, Lino and
                      Offermann, Tobias and Xue, Ran and Tu, Jhih-Sian and
                      Trellenkamp, Stefan and Cywiński, Łukasz and Bluhm,
                      Hendrik and Schreiber, Lars R.},
      title        = {{S}pin-{EPR}-pair separation by conveyor-mode single
                      electron shuttling in {S}i/{S}i{G}e},
      publisher    = {arXiv},
      reportid     = {FZJ-2024-01805},
      year         = {2023},
      abstract     = {Long-ranged coherent qubit coupling is a missing function
                      block for scaling up spin qubit based quantum computing
                      solutions. Spin-coherent conveyor-mode electron-shuttling
                      could enable spin quantum-chips with scalable and sparse
                      qubit-architecture. Its key feature is the operation by only
                      few easily tuneable input terminals and compatibility with
                      industrial gate-fabrication. Single electron shuttling in
                      conveyor-mode in a 420 nm long quantum bus has been
                      demonstrated previously. Here we investigate the spin
                      coherence during conveyor-mode shuttling by separation and
                      rejoining an Einstein-Podolsky-Rosen (EPR) spin-pair.
                      Compared to previous work we boost the shuttle velocity by a
                      factor of 10000. We observe a rising spin-qubit dephasing
                      time with the longer shuttle distances due to motional
                      narrowing and estimate the spin-shuttle infidelity due to
                      dephasing to be 0.7 $\%$ for a total shuttle distance of
                      nominal 560 nm. Shuttling several loops up to an accumulated
                      distance of 3.36 $μ$m, spin-entanglement of the EPR pair is
                      still detectable, giving good perspective for our approach
                      of a shuttle-based scalable quantum computing architecture
                      in silicon.},
      keywords     = {Quantum Physics (quant-ph) (Other) / Mesoscale and
                      Nanoscale Physics (cond-mat.mes-hall) (Other) / FOS:
                      Physical sciences (Other)},
      cin          = {PGI-11 / HNF},
      cid          = {I:(DE-Juel1)PGI-11-20170113 / I:(DE-Juel1)HNF-20170116},
      pnm          = {5221 - Advanced Solid-State Qubits and Qubit Systems
                      (POF4-522)},
      pid          = {G:(DE-HGF)POF4-5221},
      typ          = {PUB:(DE-HGF)25},
      doi          = {10.48550/ARXIV.2307.04897},
      url          = {https://juser.fz-juelich.de/record/1023792},
}