Joschka Roffe
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Joschka Roffe
@qec.codes
500 followers 510 following 32 posts
Quantum Error Correction | Quantum Software Lab | University of Edinburgh
Homepage: https://roffe.eu
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qec.codes
James Mills introducing Logical Accreditation to #QEC2025 at @yaleqi.bsky.social
See our recent preprint here: arxiv.org/abs/2508.05523
August 12, 2025 at 5:42 PM
qec.codes
Happy World Quantum Day! I'm excited to announce that I will be starting a new group dedicated to quantum error correction (QEC) at The University of Edinburgh Quantum Software Lab, funded by an EPSRC Quantum Technology Career Acceleration Fellowship!
A banner showing a photo of Joschka Roffe. The following text is superimposed on the photo: "Joschka Roffe awarded EPSRC Quantum Technology Career Acceleration Fellowship". The University of Edinburgh School of Informatics logo and the UKRI EPSRC logo are also included in the banner.
April 14, 2025 at 3:25 PM
qec.codes
Remember: the surface code threshold is not the breakeven point (for finite-size codes).
This image shows a threshold plot. The breakeven line is superimposed. I am explaining the difference.
November 21, 2024 at 11:00 AM
qec.codes
PSA: The Tanner graph representation is the best way of depicting surface codes.
Image displays two representations of a QEC protocol. The first uses the traditional circuit notation and the second a Tanner graph notation similar to that used for classical LDPC codes.
November 21, 2024 at 11:00 AM
qec.codes
I've enjoyed teaching students at Edinburgh University about QEC this term. Here I am introducing the famous [[9,1,3]] Shor code.
The circuit for the [[9,1,3]] Shor code. This QEC protocol is constructed by concatenating the 3-qubit phase-flip repetition code with the 3-qubit bit-flip repetition code.
November 21, 2024 at 11:00 AM