Hackweek 2026: What happens when a physics lab stops research for ~two weeks Research labs are exciting environments where we learn, discover and invent new things. But they can be weird as well. You can have someone who fabricates superconducting qubits or photonic circuits a...

quantum-noise.ghost.io/hackweek-202...

that's awesome! :)

Quantum Sensing Like a Bird A few nights ago I was on a panel on Quantum Sensing for Defense. Preparing for this panel crystallized some ideas for me, which I think I should write down somewhere. So here it is! When we talk abo...

Putting my thoughts together. Why networks beat "hero" sensors and what birds can teach us.
quantum-noise.ghost.io/quantum-sens...

Meet the Winner of the 2026 ACS Photonics Young Investigator Lectureship Award | ACS Publications Chemistry Blog Read an exclusive interview with the winner, Mikhail Kats, and learn more about his work and career.

Did a little interview with @acs.org Axial for an ACS and @spie.org award: axial.acs.org/physical-che...

PROJECT HAIL MARY Trailer (2025) Ryan Gosling YouTube video by ONE Media

Omg omg omg omg

youtu.be/vkcENinRJ-g

퀀텀 코리아 2025 키노트① Oskar Painter YouTube video by 퀀텀코리아(Quantumkorea)

Watch Oskar Painter's presentation from Quantum Korea in Seoul. As Director of Quantum Hardware at AWS Center for Quantum Computing, he discusses the 'quantum tyranny of numbers' & forecasts major quantum error correction advances
www.youtube.com/watch?v=Ojnf...

#QuantumComputing #AWS

Is Lindblad for me? The Lindblad master equation is a foundational tool for modeling the dynamics of open quantum systems. As its use has extended far beyond its original domain, the boundaries of its validity have grown...

Lindblad is for everyone!
arxiv.org/abs/2506.22436

A major milestone in my career, as one of the self-appointed knights of quantum.

Since I don’t think it’s possible to be this obtuse, I’m assuming this is just marketing for your widget.

I’m sorry I wasted my time thinking you actually wanted a definition for a quantum computer.

I’m also sorry you need to waste people’s time to sell the thing but c’est la vie.

A quantum computer is a physical machine that can execute quantum algorithms with at most polynomial resource scaling.

It’s not a “legal term” where I live, and my statement was clearly a conditional, so not an accusation.

Let’s stick to subjects we both understand: Are your students walking away with the clear understanding that a classical simulator with exponential scaling is not a quantum computer?

Chris, you're doing educational malpractice if your students are walking away without a clear understanding of the difference between a classical simulation and an actual quantum computer. Ignoring the entire premise of quantum computing just to sell widgets isn't a noble antiestablishment position.

Yes this is the right definition because the whole point of trying to build a quantum computer is their ability to do certain computations much more efficiently. It’s been central since 1982.

But the most important thing IMO is centering it on scalability like Craig did.

what's wrong with this definition: A quantum computer is a physical machine that can execute quantum algorithms with at most polynomial resource scaling.

Your critique of DV didn't make much sense to me:
2- it's architecture agnostic, we can at least simulate qubits, initialization, gates, etc. in any arch.
3- who cares?
4- They're criteria, not an object description. Just like "the criteria for a valid airplane" doesn't refer to a single 747.

Personally I would go with a simpler definition: A quantum computer is a physical machine that can execute quantum algorithms with at most polynomial resource scaling.

DV criteria are necessary. Craig was just pointing out where your system clearly fails.

IQC and Waterloo mourn the loss of Raymond Laflamme | Institute for Quantum Computing | University of Waterloo Raymond Laflamme, a trailblazer in quantum information processing and pioneer of the Institute for Quantum Computing (IQC) at the University of Waterloo, died on June 19 after a lengthy battle with ca...

Raymond Laflamme 1960-2025. A great scientist, renowned for his pioneering contributions to quantum error correction. A great leader, founding director of the Institute for Quantum Computing. A great colleague and teacher whose legacy continues to inspire us.
uwaterloo.ca/institute-fo...

Craig did give a definition (scalability being key), and it seems much more informative and operationally useful than your definition.

Are you having trouble understanding this definition? Maybe you can point out what is unclear about it and the community can help you.

He's right. "Nothing short of devastating"
By @holdenthorp.bsky.social @science.org
www.science.org/doi/10.1126/...

Anti-Nazi fighter? English is a weird language.

Michael Roukes presenting slide describing a converation between him, Andrew Cleland, and Tom Kenny.

Michael Roukes kicking off #FNS2025, going back 30 years to the beginning of NEMs. (explaining this paper arxiv.org/abs/2505.04574 which was then rejected by APL!)

The building committee gets a first look at the basement of the Ginsburg Center for Quantum Precision Measurement at Caltech. We're standing where a tunnel will connect Ginsburg labs to labs in neighboring Downs Laboratory. With me are Nick Hutzler, Rana Adhikari, Michelle Effros, and Dave Hsieh.

Probing the quantum motion of a macroscopic mechanical oscillator with a radio-frequency superconducting qubit Long-lived mechanical resonators like drums oscillating at MHz frequencies and operating in the quantum regime offer a powerful platform for quantum technologies and tests of fundamental physics. Yet,...

New paper out! We resonantly couple a superconducting heavy-fluxonium qubit ⚛️ to a macroscopic membrane 🥁 oscillating at a few MHz. ~300 repeated interactions let us track its quantum motion, observe back-action & probe non-commuting operators. Diósi–Penrose next? (1/8)
arxiv.org/abs/2505.21481

Les Houches lecture notes Spending a few days at Les Houches workshop on TFLN photonics 😄 Here are my lecture notes. These are currently a very rough draft, though fairly respectable looking... I used Gemini 2.5 pretty heavil...

At the beautiful Les Houches for a workshop on TFLN #photonics 💡

Here are my lecture notes:

quantum-noise.ghost.io/les-houches-...

Big: The final version of a randomized, controlled World Bank study finds using a GPT-4 tutor with teacher guidance in a six week afterschool program in Nigeria had "more than twice the effect of some of the most effective interventions in education" ("equating to 1.5 to 2 years" of standard school)

Morning prayer for the faithful

Sunset!

Marko is a pioneer and leader in the field, and this is a technology existential for data centers and quantum, and all sorts of sensors and devices for health, defense ..

In fact I’m flying to a summer school they’re holding in France right now to give a lectures on this research. Crazy to cut it.

I guess I’m trying to separate two concerns. Trying to understand if the ickyness is over a human not being paid or studio ghibli not being paid.