Henry Legg @PhysicsHenry

Lecturer (~asst prof) investigating quantum physics @univofstandrews. My opinions belong to 28 highly trained monkeys and are not those of my employer. legg.wp.st-andrews.ac.uk St Andrews Joined December 2013

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Henry Legg @PhysicsHenry

4 months ago

Microsoft's Majorana team are now cosplaying as "a small startup sitting inside a huge tech company" Just your typical shoestring outfit: 100+ people and $1 billion+ burnt As if we needed any more evidence that this team is now fully detached from reality...

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Henry Legg @PhysicsHenry

5 months ago

The German press has been largely very good dealing with @MSFTQuantum’s nonsense. However, a little reminder: 😡Schottland ist nicht England!😡 🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿

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Henry Legg @PhysicsHenry

6 months ago

2025 Anaheim Global Physics Summit was overwhelmed by nonsensical noise presented by MSFT as evidence of a topological qubit after claiming to the world they had built one. There you go Sankar — I fixed your tweet for you.

Condensed Matter Theory Center @condensed_the

6 months ago

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Henry Legg @PhysicsHenry

6 months ago

Sunday stroll in the Scottish sunshine

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Henry Legg @PhysicsHenry

6 months ago

“The gap protocol is flawed,” said Henry Legg of the University of St Andrews. “The foundations to build a topological qubit aren’t there, and anyone claiming they have built one today is selling a dangerous fairy tale.” physics.aps.org/articles/v18/68

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Henry Legg @PhysicsHenry

6 months ago

My summary slide yesterday: 1) We do not have a reliable way to detect Majoranas 2) The conductance data shows that there is no clear superconducting gap in these devices There is no reason to believe the noise presented today has anything to do with a topological qubit.

Henry Legg @PhysicsHenry

6 months ago

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Henry Legg @PhysicsHenry

6 months ago

The magnetic field ranges for the topological gap protocol of the two wires in Microsoft’s “tetron” are different. These wires are on the same chip! We know changing magnetic field range can change the TGP outcome. Explain please @MSFTQuantum

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Henry Legg @PhysicsHenry

6 months ago

Look what I found…

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Henry Legg @PhysicsHenry

6 months ago

Microsoft want you to believe this data shows the X measurement of a topological qubit. As an expert in this field here is my scientific take on what I see in this data: 💩💩💩💩💩

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Henry Legg @PhysicsHenry

6 months ago

Thank you to everyone that came to my talk today and all the support over the last few weeks. Today was an important day for protecting the scientific record #apsmarch

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Henry Legg @PhysicsHenry

6 months ago

Microsoft Quantum just admitted several mistakes in their topological gap protocol. Most importantly, that their self-declared ‘main result’ in PRB 107, 245423—that they passed arXiv:2103.12217—is not true. I expect them to promptly inform @APSphysics of their retraction.