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Amir Safavi-Naeini

@safavi.bsky.social
541 followers 326 following 177 posts

Building cool quantum, photonic, and nanomechanical stuff as Prof at Stanford. quantum-noise.ghost.io

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Reposted by Amir Safavi-Naeini
John Preskill @preskill.bsky.social · 18/07/2026
My friend Mark Wise quantumfrontiers.com/2026/07/18/m...
quantumfrontiers.com
My friend Mark Wise
Mark Wise, the John A. McCone Professor of High Energy Physics at Caltech, passed away on July 10 at age 72. At a recent memorial service, John Preskill made these remarks. I’m John Preskill, Mark’…
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Amir Safavi-Naeini @safavi.bsky.social · 16/02/2026
quantum-noise.ghost.io/hackweek-202...
quantum-noise.ghost.io
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...
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Amir Safavi-Naeini @safavi.bsky.social · 28/09/2025
that's awesome! :)
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Amir Safavi-Naeini @safavi.bsky.social · 28/09/2025
Putting my thoughts together. Why networks beat "hero" sensors and what birds can teach us. quantum-noise.ghost.io/quantum-sens...
quantum-noise.ghost.io
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...
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Reposted by Amir Safavi-Naeini
Mikhail Kats @mickeykats.bsky.social · 07/07/2025
Did a little interview with @acs.org Axial for an ACS and @spie.org award: axial.acs.org/physical-che...
axial.acs.org
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.
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Amir Safavi-Naeini @safavi.bsky.social · 01/07/2025
Omg omg omg omg youtu.be/vkcENinRJ-g
youtu.be
PROJECT HAIL MARY Trailer (2025) Ryan Gosling
YouTube video by ONE Media
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Michael Brett @michaelsbrett.bsky.social · 28/06/2025
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
youtube.com
퀀텀 코리아 2025 키노트① Oskar Painter
YouTube video by 퀀텀코리아(Quantumkorea)
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Reposted by Amir Safavi-Naeini
Dulwich Quantum Computing @dulwichquantum.bsky.social · 30/06/2025
Lindblad is for everyone! arxiv.org/abs/2506.22436
arxiv.org
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...
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Amir Safavi-Naeini @safavi.bsky.social · 26/06/2025
A major milestone in my career, as one of the self-appointed knights of quantum.
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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.
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
A quantum computer is a physical machine that can execute quantum algorithms with at most polynomial resource scaling.
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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?
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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.
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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.
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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.
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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.
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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.
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John Preskill @preskill.bsky.social · 21/06/2025
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...
uwaterloo.ca
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...
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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.
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Amir Safavi-Naeini @safavi.bsky.social · 25/06/2025
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Reposted by Amir Safavi-Naeini
Eric Topol @erictopol.bsky.social · 05/06/2025
He's right. "Nothing short of devastating" By @holdenthorp.bsky.social @science.org www.science.org/doi/10.1126/...
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Amir Safavi-Naeini @safavi.bsky.social · 04/06/2025
Anti-Nazi fighter? English is a weird language.
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Amir Safavi-Naeini @safavi.bsky.social · 03/06/2025
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!)
Michael Roukes presenting slide describing a converation between him, Andrew Cleland, and Tom Kenny.
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John Preskill @preskill.bsky.social · 31/05/2025
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.
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Emmanuel Flurin @manuflurin.bsky.social · 28/05/2025
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
arxiv.org
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,...
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Amir Safavi-Naeini @safavi.bsky.social · 20/05/2025
At the beautiful Les Houches for a workshop on TFLN #photonics 💡 Here are my lecture notes: quantum-noise.ghost.io/les-houches-...
quantum-noise.ghost.io
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...
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Reposted by Amir Safavi-Naeini
Ethan Mollick @emollick.bsky.social · 20/05/2025
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)
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Amir Safavi-Naeini @safavi.bsky.social · 20/05/2025
Morning prayer for the faithful
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Amir Safavi-Naeini @safavi.bsky.social · 19/05/2025
Sunset!
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Amir Safavi-Naeini @safavi.bsky.social · 15/05/2025
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.
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Amir Safavi-Naeini @safavi.bsky.social · 15/05/2025
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.
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Amir Safavi-Naeini @safavi.bsky.social · 15/05/2025
This is helpful. GenAI is not a person, I agree. Imagine someone trains to draw only in studio ghibli style, via just practicing that specific style, and doing it in a formulaic way; I’m not sure if most people would call them an artist. You’re ok if someone commissions them and avoids royalties?
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Amir Safavi-Naeini @safavi.bsky.social · 15/05/2025
Would you be ok if they had paid someone to paint that exact image? (Serious question, trying to understand)
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Reposted by Amir Safavi-Naeini
Emmanuel Flurin @manuflurin.bsky.social · 09/05/2025
These notes are amazing, just the right amount of detail and insight! Thanks!
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Amir Safavi-Naeini @safavi.bsky.social · 09/05/2025
Every time I am tempted and I start using Markdown + Tex equations, after getting to document that’s more than 2 pages long I just end up coming back to full LaTeX.
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Amir Safavi-Naeini @safavi.bsky.social · 09/05/2025
🙏🏽
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Amir Safavi-Naeini @safavi.bsky.social · 09/05/2025
Notes on classical and quantum fisher information. quantum-noise.ghost.io/fidelity-fis...
quantum-noise.ghost.io
Fidelity, Fisher Information, QCRB and All that [pt. 1]
What about those time-energy and number-phase uncertainty relations? The way the time-energy uncertainty was often explained to me when I first learned quantum mechanics felt pretty hand-wavy ... The ...
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Amir Safavi-Naeini @safavi.bsky.social · 08/05/2025
How long before the quantum terror?
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Amir Safavi-Naeini @safavi.bsky.social · 05/05/2025
If you need to ask, you can’t afford it…
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Department of Chemistry, Stanford University @stanfordchemistry.bsky.social · 03/05/2025
A collaboration between the Moerner and Qi Labs has produced a tool to track real-time genome dynamics in living cells — combining single-molecule imaging + CRISPR innovation. 🧬 🔗 chemistry.stanford.edu/news/new-too... #MoernerLab #QiLab #GenomeImaging #CRISPR
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Amir Safavi-Naeini @safavi.bsky.social · 03/05/2025
This is so Normcore
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Amir Safavi-Naeini @safavi.bsky.social · 02/05/2025
quantum-noise.ghost.io/free-energy-...
quantum-noise.ghost.io
Free Energy for Computer Scientists
If nature only cared about minimizing energy, all the gas molecules around us would collapse to the floor and we would suffocate. If nature only maximized entropy, all the gas would expand and dispers...
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Amir Safavi-Naeini @safavi.bsky.social · 02/05/2025
And here’s my first post :) Ever wondered what “free energy” is?
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Amir Safavi-Naeini @safavi.bsky.social · 02/05/2025
quantum-noise.ghost.io
quantum-noise.ghost.io
Quantum Noise
Field notes from the quantum-classical boundary
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Amir Safavi-Naeini @safavi.bsky.social · 02/05/2025
I decided to make a website. I’ll post stuff on it every once in a while.
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Fire Captain 🔥 @rescuecaptain.bsky.social · 25/02/2025
#maddow Science break. This kayaker gets approached by an otter every time he visits a lake. The otter was orphaned after the mother was in an accident, and the man helped it throughout it's rehabilitation process to later release it back into the wild. Volume up.🔊
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Amir Safavi-Naeini @safavi.bsky.social · 28/04/2025
Maybe it took people a while to get it.
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Amir Safavi-Naeini @safavi.bsky.social · 27/04/2025
I had an argument where I was on the opposite side of this… the question was whether within the context of a university we should remove incentives for bad behavior (eg. reduce the number ways people could cheat if they so choose) or expect students to behave in a moral ways despite the shortcuts.
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Julie Packard @juliepackard.montereybayaquarium.org · 22/04/2025
We press forward with determination, grounded in the values that have made us a trusted and effective advocate for ocean conservation. We lead with hope. The path may not always be straight, but our commitment and belief in humanity’s ability to come together and heal the planet is still unwavering.
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John Preskill @preskill.bsky.social · 21/04/2025
If you are interested in quantum computing, I strongly recommend this insightful article by @caltech.edu student @robbieking1000.bsky.social calling for a "scrappier approach" to finding new applications. quantumfrontiers.com/2025/04/20/q...
quantumfrontiers.com
Quantum Algorithms: A Call To Action
Quantum computing finds itself in a peculiar situation. The number one question asked about quantum computers by outsiders is very common sensical: What are they good for? The honest answer reveals…
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