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DESCRIPTION:Pipes\, Loops\, Snakes and more: Quantum computing with semiconductor devices \nSimon Benjamin\, Oxford University and Quantum Motion Ltd. \nSemiconductor devices present unique opportunities for fault tolerant\, large scale quantum computing. The prospect of fast and high fidelity shuttling of electrons is particularly exciting\, allowing some powerful and surprising designs. I’ll focus on two shuttling-based paradigms and I’ll use the surface code as the example protocol\, although the methods are not limited to this. In the looped pipeline approach1 multiple qubits move in closed cycles -- remarkably\, this allows an effective 3D architecture although the physical device is 2D. This can be very helpful in routing information\, and for supporting otherwise-impossible codes2. A more radical paradigm is “snakes on a plane”3 which reformats logical qubits into 1D entities that can then move freely over a 2D lattice. This creates a vulnerability that can be tackled using a powerful resource called decoder confidence (a.k.a. decoder soft information) that has multiple applications4. All these ideas are compatible both with single-electron physical qubits and with dual-spin encoding\, the latter bringing the advantage of ‘erasure conversion’5.  \n\n• “Looped Pipelines Enabling Effective 3D Qubit Lattices in a Strictly 2D Device”\, Zhenyu Cai\, Adam Siegel and SCB\, PRXQ 4\, 020345\, 2023 \n\n• “Folded Surface Code” Zhu Sun and Zhenyu Cai\, arXiv:2601.19823 \n\n• “Snakes on a Plane: mobile\, low dimensional logical qubits on a 2D surface”\, Adam Siegel\, et al\, arxiv:2501.02120 & PRXQ 7\, 010339 2026. \n\n• For general intro see e.g. “Decoder confidence” arXiv:2512.15689   \n\n• “Erasure conversion” arXiv:2601.10461   \n\nIQC faculty host: Jonathan Baugh\nLocation\nQNC 0101
X-ALT-DESC;FMTTYPE=text/html:Pipes, Loops, Snakes and more: Quantum computing with semiconductor devices <br />Simon Benjamin, Oxford University and Quantum Motion Ltd. <br />Semiconductor devices present unique opportunities for fault tolerant, large scale quantum computing. The prospect of fast and high fidelity shuttling of electrons is particularly exciting, allowing some powerful and surprising designs. I’ll focus on two shuttling-based paradigms and I’ll use the surface code as the example protocol, although the methods are not limited to this. In the looped pipeline approach1 multiple qubits move in closed cycles -- remarkably, this allows an effective 3D architecture although the physical device is 2D. This can be very helpful in routing information, and for supporting otherwise-impossible codes2. A more radical paradigm is “snakes on a plane”3 which reformats logical qubits into 1D entities that can then move freely over a 2D lattice. This creates a vulnerability that can be tackled using a powerful resource called decoder confidence (a.k.a. decoder soft information) that has multiple applications4. All these ideas are compatible both with single-electron physical qubits and with dual-spin encoding, the latter bringing the advantage of ‘erasure conversion’5.  <br /><ol start="1"><li>“Looped Pipelines Enabling Effective 3D Qubit Lattices in a Strictly 2D Device”, Zhenyu Cai, Adam Siegel and SCB, PRXQ 4, 020345, 2023 </li></ol><ol start="2"><li>“Folded Surface Code” Zhu Sun and Zhenyu Cai, arXiv:2601.19823 </li></ol><ol start="3"><li>“Snakes on a Plane: mobile, low dimensional logical qubits on a 2D surface”, Adam Siegel, et al, arxiv:2501.02120 &amp; PRXQ 7, 010339 2026. </li></ol><ol start="4"><li>For general intro see e.g. “Decoder confidence” arXiv:2512.15689   </li></ol><ol start="5"><li>“Erasure conversion” arXiv:2601.10461   </li></ol>IQC faculty host: Jonathan Baugh<br />Location<br />QNC 0101
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SUMMARY:IQC Colloquium featuring Simon Benjamin
DTSTART;TZID=America/New_York:20260323T143000
DTEND;TZID=America/New_York:20260323T153000
DTSTAMP:20260530T110711Z
TRANSP:OPAQUE
STATUS:CONFIRMED
SEQUENCE:0
LOCATION:QNC 101
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