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<p>Hi all,</p>
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<p>We will have our next PASS talk on Monday with Shelby talking
about his work on Quantum Computing. Please join us on <b>November
4th (Monday)</b> at <b>noon</b> (from 12:00 pm to 1:00 pm) in
the <b>Nebula Room</b> (PHYS 3027).</p>
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<p><span><span class="gmail-Y8pC0"></span></span></p>
<div aria-describedby="tt-display-name-field" class="gmail-YysZRb"
align="center"><b>Shelby Mo, PhD student</b></div>
<div aria-describedby="tt-display-name-field" class="gmail-YysZRb">
<p align="center">Monday, 12:00 pm, Nebula Room (PHYS 3027)</p>
<div dir="auto" align="center"><b>Modular Fault tolerant scaling
of a quantum chip with lossy links</b></div>
<div dir="auto" align="center"><b><br>
</b></div>
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<div align="center">A modular approach presents a highly
promising direction for scalable quantum computing. In this
work, we show that separate patches of rotated surface code
can be reliably connected through a fault-tolerant interface,
even in the presence of substantial noise. By implementing a
ZigZag cut along the boundary and using a pair of entangled
ancillas as an extraction gadget—similar to Shor's gadget,
hereafter referred to as the CAT ancilla—our design withstands
up to 28 times more noise at the interface than in the bulk,
doubling the best-known tolerance to date (Ramette <em>et al.</em>,
2024). Our approach also cleverly mitigates hook errors
through an optimized measurement schedule and strategic
boundary choice between modules. Achieving a high interface
noise threshold around 18% and a bulk threshold near 1%, this
design enables exceptionally low logical error rates, marking
a critical step toward practical fault-tolerant scaling of
modular quantum devices with existing technologies. <br>
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<p>If you’re interested in sharing your work as a speaker,
please feel free to add your name to the spreadsheet [<a
href="https://docs.google.com/spreadsheets/d/1N3ncf43jdB6aHYHhyWmyHMycxDg4_phHZXLkQvviO0o/edit?usp=sharing"
target="_blank">Google Sheet</a>].</p>
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<div>Best,</div>
<div>Pooyan</div>
<span><span>
<div>Physics and Astronomy Student Seminar (PASS)</div>
</span></span></div>
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<div aria-describedby="tt-display-name-field" class="gmail-YysZRb"><b><br>
</b></div>
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