Matthew Sarsby

Before: quantum fluids and and µm³ sized electronics at µK temperatures. Now I lead a team to build quantum computers.

[Matthew Sarsby @generalsarsby]

We are looking for a Quantum Hardware Engineer to help build the future of quantum computing.

If you're passionate about the design–build–measure–debug loop and love working with systems, electronics, or cryogenics — we want to hear from you.
https://t.co/6BkmA01GSa

[Matthew Sarsby @generalsarsby]

So I make a lot of programmatically generated documentation and diagrams. I do use a tiny homemade library to help the python interface to SVG. I've open sourced what I find is a very handy tiny bit of code https://t.co/urvS7Py8Oj

[Matthew Sarsby @generalsarsby]

@meetIQM @JanGoetz6 @jjvartiainen @HermanniHei Check out the figures 4 and 5 for the cryogenics and the system-in-a-box photographs! 📸

[Matthew Sarsby @generalsarsby]

@Xangrydocs @nccrSpin That is a parallel array of adiabatic nuclear cooling stages, used to cool the sample below directly through the control lines to temperatures colder than achievable from any dilution fridge.

[Matthew Sarsby @generalsarsby]

@Fraustief_in_IT @fzj_jsc @LRZ_DE This is a showcase of some real cryomechanical hardware used to build the quantum computers of @meetIQM .

[Matthew Sarsby @generalsarsby]

Okay Quantum Twitter, What's your preferred symbol for a dielectric loss component in your circuit diagrams? I see a) around lots, b) makes some sense, less common, c) is the wordy way out.

[Matthew Sarsby @generalsarsby]

@AndreasAtETH @qudev @ETH @ETH_en @ETHQuantumCntr I love these things. I don't have a source on the actuators for the rods.

[Matthew Sarsby @generalsarsby]

How lucky are we with cryostats to have unicode symbols that perfectly describe a warm up 📈 and a cooldown 📉. They even the red and blue colours the right way around!

[Matthew Sarsby @generalsarsby]

What's the right collective noun for a set of dilution fridges?

[Matthew Sarsby @generalsarsby]

@harriet_oxinst @OxInst Second question. Do you have data on the effect for large payloads? Cooling an empty fridge fast is one thing, but with a 50kg mass on the MC this should help even more.

[Matthew Sarsby @generalsarsby]

@harriet_oxinst @OxInst That's really neat! I was going to try to make my own, do you sell them yet?

[Matthew Sarsby @generalsarsby]

@AndreasAtETH It's the physicists number 1 choice in cryogenic ties. Just avoid the scented flavors.

[Matthew Sarsby @generalsarsby]

"A Christmas poem about quantum computers" - A prompt

[Matthew Sarsby @generalsarsby]

@AndreasAtETH @ETH_en @psich_en yeah, a lot like that! 😁 looks good!

[Matthew Sarsby @generalsarsby]

@DrDonutsLab These are Au plated copper. Mechanical stability reduces electromotive and triboelectric pickup. Thermally to help only a little as there is ptfe dielectric insulation and then weak electron photon coupling in a low loss transmission. But it's better than floating

[Matthew Sarsby @generalsarsby]

I am surly biased, but I do love a well cable managed fridge. How do you keep yours tidy?

[Alireza Yazdi @aryazdi]

Hey quantum folks:

We have now a dedicated #quantum Mastodon server: https://t.co/GLmbrZud16.

Here is the invite for you guys to join: https://t.co/JNFIdI2Fat

Feel free to share with all qubit loving people!

May the qubit be with you!
@AndreasAtETH @preskill

[Matthew Sarsby @generalsarsby]

Had a quick look and thoughts of the Model I. @cryoZP Some guesswork around the heat exchangers. I wonder how this stacks up with the established commercial Inverted dilution fridges on the market (from https://t.co/bQh7KuLG2m)

[Matthew Sarsby @generalsarsby]

@AndreasAtETH @ETH_en @psich_en @KerschbaumMi @BesseJC @eichler__chris @AlainFauquex @Joel_Mesot @ETHQuantumCntr @qudev @ETH_physics @ETH Did you know 1 or 0.5µm of gold plating is 'relatively' cheap. You don't have to be up-sold to the 2.5µm thickness. Counter point to that is that oxidized copper itself is a good IR absorber at low temperatures, giving free blackening in the spectrum that
some worry about. 🤷‍♂️