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Emmanuel Flurin @manuflurin.bsky.social · 1d

What it really feels like interacting with your physics heroes!
Such a beautiful and fundamental prize 🤩
www.nobelprize.org/prizes/physi...

a close up of a statue of yoda with the words `` learning you are '' written above him .

ALT: a close up of a statue of yoda with the words `` learning you are '' written above him .

media.tenor.com

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Reposted by Emmanuel Flurin

Victor V. Albert @vva.bsky.social · 1d

Every time I interact with Michel, he has some deep insight that I understand only years later. Maybe it is not completely fleshed out technically but it is always on point. It reminded me of other winners in the past. Well deserved!

Rod Van Meter @rdvquantum.bsky.social · 1d

Nobel in Physics to Clarke, Devoret and Martinis! Congratulations to them!

Citation says for work in the 1980s on quantized current.

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Reposted by Emmanuel Flurin

Steve Flammia @sflammia.bsky.social · 1d

Outstanding choices!

Dan Garisto @dangaristo.bsky.social · 1d

Interesting bit of sociology: They are really studiously avoiding any mention of quantum computing. First and only mention came in the last few words of the presentation by Johansson.

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Amir Safavi-Naeini @safavi.bsky.social · 10d

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

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...

quantum-noise.ghost.io

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Emmanuel Flurin @manuflurin.bsky.social · 15d

What category split would you suggest? Quant phys / Quant info?

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anthony-leverrier.bsky.social @anthony-leverrier.bsky.social · 20d

Can ChatGPT help with research? Maybe not yet for finding new results, but it can certainly speed up some tedious tasks.

An example about quantum Tanner codes #qLDPC
Working with qudits (d=5) lets you use nice local codes [4,2,3]_5. Then the idea is simply to enumerate small groups and (1/4)

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Reposted by Emmanuel Flurin

Dulwich Quantum Computing @dulwichquantum.bsky.social · Jun 18

What is common knowledge in your field but shocks outsiders?

n qubits can reliably store only n bits.

Dr. SkySkull @drskyskull.bsky.social · Sep 5

What is common knowledge in your field but shocks outsiders?

It's been over a hundred years since we first realized that quantum mechanics is a thing, but we still don't actually understand what it *means* about the nature of our universe.

(Though we can predict the output of experiments fine.)

🇵🇸Martin “Doomsday” Pfeiffer🖖🏳️‍🌈 @nuclearanthro.bsky.social · Sep 5

What is common knowledge in your field but shocks outsiders?

The President of the United States of America uas unilateral authority to fire off nuclear weapons with no legal oversight from anyone.

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Emmanuel Flurin @manuflurin.bsky.social · May 28

@dulwichquantum.bsky.social

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Emmanuel Flurin @manuflurin.bsky.social · May 28

and of course, a big thank you to our funding agencies @agencerecherche.bsky.social , @dimQuantip and host institutions @lkblab.bsky.social , @sorbonne-universite.fr ,
@cea.fr, @Alice__Bob. This work wouldn’t exist without your support!

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Emmanuel Flurin @manuflurin.bsky.social · May 28

This is a first step toward probing quantum gravity with mechanical systems. Many exciting directions ahead: stronger coupling and longer coherence time would enable ground state cooling and cat-state preparation using our qubit as quantum controller! (8/8)

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Emmanuel Flurin @manuflurin.bsky.social · May 28

Crucially, our system is massive enough (~5 ng) and coherent enough (~0.3 ms) that it approaches the regime where gravitational decoherence, as proposed by Diósi and Penrose, would become observable (t_G ~ 0.5 ms).(7/8)

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Emmanuel Flurin @manuflurin.bsky.social · May 28

This imbalance directly reflects the non-commutativity of the mechanical creation and annihilation operators. A subtle but fundamental quantum effect—now visible through repeated coupling to a genuine two-level system.(6/8)

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Emmanuel Flurin @manuflurin.bsky.social · May 28

The data reveals thermal noise (nth ≈ 47 at 10 mK), plus clear signatures of qubit-induced back-action. By preparing the qubit in |g⟩ or |e⟩, we selectively probe the absorption (n) or emission (n+1) spectrum. (5/8)

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Emmanuel Flurin @manuflurin.bsky.social · May 28

We perform a sequence of stroboscopic weak measurements: after each qubit–membrane interaction, we read out the qubit in a single shot. From this, we reconstruct the membrane's motion spectrum—phonon by phonon.(4/8)

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Emmanuel Flurin @manuflurin.bsky.social · May 28

Our solution: a heavy-fluxonium qubit with a MHz-range transition, long coherence, and fast reset. This architecture enables resonant, repeatable interactions with a 4 MHz vibrating SiN membrane, sustained over its 6 ms lifetime.(3/8)

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Emmanuel Flurin @manuflurin.bsky.social · May 28

Mechanical oscillators are promising platforms for probing quantum mechanics at macroscopic scales—but coupling them strongly and coherently to a well-controlled quantum system has been a longstanding challenge. (2/8)

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Emmanuel Flurin @manuflurin.bsky.social · May 28

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

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,...

arxiv.org

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Craig Gidney @craiggidney.bsky.social · May 23

I'm often asked if I'll redo the 2019 quantum factoring estimate. Denser storage by yokes, smaller magic factories by cultivation, slimmer approx arithmetic by Chevignard et al… surely the cost is lower now?

Yes, it's lower now.

security.googleblog.com/2025/05/trac...

arxiv.org/abs/2505.15917

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Emmanuel Flurin @manuflurin.bsky.social · May 9

These notes are amazing, just the right amount of detail and insight! Thanks!

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Amir Safavi-Naeini @safavi.bsky.social · May 9

Notes on classical and quantum fisher information.

quantum-noise.ghost.io/fidelity-fis...

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 ...

quantum-noise.ghost.io

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Reposted by Emmanuel Flurin

anthony-leverrier.bsky.social @anthony-leverrier.bsky.social · May 6

Open position: we have an excited opening for a 3-year contract (including a very nice welcome package to start building a small team) in our group at Inria Paris. If you want to work on quantum LDPC codes and fault tolerance, please consider applying. (1/2)

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Reposted by Emmanuel Flurin

Timo Hillmann @timohillmann.bsky.social · Feb 13

I’m super excited to see the experimental realization of a variant of the dissipatively stabilized squeezed cat that we proposed! Congrats to Alice & Bob and everyone else involved
Especially great to see that it comes with similar performance gains as promised by the theory
arxiv.org/abs/2502.07892

Enhancing dissipative cat qubit protection by squeezing

Dissipative cat-qubits are a promising architecture for quantum processors due to their built-in quantum error correction. By leveraging two-photon stabilization, they achieve an exponentially suppres...

arxiv.org

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Reposted by Emmanuel Flurin

Graeme Smith @graemesmith.bsky.social · Jan 18

Reading papers is the new smoking

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Dave Bacon @dabacon.tachyon.institute · Dec 20

I told Craig it was crazy how fast it was from idea to implementation, and he said it should be like like a day from idea to experiment. Old dude me, I remember when your quantum computing idea might take decades to go from your idea to maybe some sort of kinda-but-just-barely experiment.

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Reposted by Emmanuel Flurin

Craig Gidney @craiggidney.bsky.social · Dec 20

Over the past year I played a supporting role on experiments showing we have a flexibility in how we do QEC on a planar chip. We do a color code (arxiv.org/abs/2412.14256), and three interesting variations of the surface code circuit (arxiv.org/abs/2412.14360), all below threshold.

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