Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
101010.pl is one of the many independent Mastodon servers you can use to participate in the fediverse.
101010.pl czyli najstarszy polski serwer Mastodon. Posiadamy wpisy do 2048 znaków.

Administered by:

Server stats:

503
active users

101010.pl: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.4.0-alpha.5

#quantum

5 posts5 participants0 posts today
Replied in thread
Cassandra Granade 🏳️‍⚧️

@dryad.technology When a loophole-free Bell-test was first announced, superdeterminism was raised as an objection; in response, the experimenters did an XOR of the RNG they used to pick experimental settings with a hash of the last thousand tweets to use the #quantum hashtag.

That doesn't strictly defeat superdeterminism, but it stretches credulity to imagine that the Big Bang was able to fuck with measurement settings even when filtered through random shit on Twitter.

QUINTO project

We just submitted the first QUINTO draft of paper to a journal. Let's see what the editors and reviewers think.

The paper is about fractional quantum Hall states in atomic arrays. Here is the popular summary we submitted alongside:

"When atoms are arranged in a regular, dense array, their response to light can change drastically. The photons can bounce between the atoms, getting absorbed and re-emitted again and interfering with themselves. This field of quantum optics with atomic arrays is of active interest. Due to interactions, the limit of many absorbed photons generally remains hard to model, but at the same time may result in new, counterintuitive physical phenomena. In the search for ways to understand such systems, we can look for analogies in condensed matter physics, where the behavior of many interacting particles (electrons in this case) has been studied for decades. Here, we report on finding such an analogy between the behavior of few photons absorbed by an array and peculiar many-electron quantum states known as fractional quantum Hall (FQH) states. FQH states display many counterintuitive properties -- for example the electrons behave like they decomposed into pieces (e.g. "one third of an electron"), even though we know that in reality they are indivisible. Now we know that photons in arrays can behave similarly."

[1/2]

#physics #science #CondensedMatterPhysics #CondensedMatter #condMat #QuantumOptics #Quantum @physics

Oscar Cunningham

People say it's a misconception that quantum computers can evaluate a function on all its possible inputs in parallel. But actually a lot of quantum algorithms do begin by applying a function to a superposition of all possible inputs. It's just that after that point you need to do some difficult linear algebra and you can't always extract the information you want.

In fact, you can define a lot of important complexity classes in this way. The set of problems solvable in polynomial time with an oracle that evaluates a given circuit on all its possible inputs and tells you …

P: … nothing.
BPP: … a randomly chosen output.
PP: … a majority output.
NP: … if any of the outputs is nonzero.
co-NP: … if all of the outputs are nonzero.
PSPACE: … a fixed point.

#Math#Maths#Mathematics
Continued thread
Nonilex

#Trump aims to slash funding for the National #Science Foundation by >50%, to $3.9B from $8.8B in 2025. The area most affected is #research & #education, including spending for #climate, #CleanEnergy & “woke” social, behavioral & economic #sciences, as well as programs the budget vaguely classifies as “low priority areas of science.”

All programs supported by the #NSF concerning #DEI in the sciences are to be eliminated. But funding for #AI & #quantum information science is to remain the same.

QUINTO project

We just came back from the "Light-Matter Interactions and Collective Effects" workshop in Paris. We heard some interesting talks on how quantum emitters (not only atoms, but also e.g. molecules and quantum dots) interact with each other and how people try to arrange them into arrays (like, putting chains of molecules inside a carbon nanotube). Darrick (my boss and supervisor of the project) gave a talk on spin liquids, while I presented a poster on fractional quantum Hall states in atom arrays.

#physics#quantum#science
C.

Daniel J. Bernstein (#djb, to those who know and love him [1]) has a new blog entry about the NIST post-quantum #cryptography standardization process that's been ongoing for some years. Also, follow him @djb .

If you're not aware of some of the controversy about how NIST is running this process, it's a must-read.

blog.cr.yp.to/20250423-mceliec

My $0.02: it sure looks like NIST is backstopping an attempt by the NSA to get everyone to standardize on cryptography #standards that the #NSA knows how to break.

Again.

Yes, they did it before. If you read up on the Dual_EC calamity and its fallout, and how this time it was supposed to be different - open, transparent, secure - then prepare to be disappointed. NIST is playing #Calvinball with their rules for this contest, yanking the rug out from under contenders that appear to be more #secure and better understood, while pushing alternatives that are objectively worse (#weaker encryption, less studied, poorer #performance).

Frankly, I think organizations outside of the #USA would be foolish to trust anything that comes out of #NIST's current work. Well, those inside the USA too, but some of those may be forced by law to use whatever NIST certifies.

[1] Some people think djb is "prickly", not lovable. Oddly, it seems that the only people who say this are those who are wildly incorrect about code/algorithms and are being gently but publicly corrected about by djb at the time

blog.cr.yp.tocr.yp.to: 2025.04.23: McEliece standardization
#quantum#PostQuantum#PostQuantumCryptography
ExploreLive feeds
About