DigitalMus

joined 2 years ago
[–] DigitalMus@feddit.dk 5 points 1 month ago
[–] DigitalMus@feddit.dk 2 points 1 month ago

You need to know which basis the sender use to collapse and measure in the same basis. Then you need to sample a statistical distribution and the desired information will be the average of the distribution. This is very well proven in the Bells inequality experiment and can definitely be used to gain information.

It is clearly not very efficient in the sense a lot of transported bits are wasted to convey less information. But the advantages of instantaneous and secure communication will be worth it in some use cases.

That is, of course, if the engineering issues such as quantum repeaters (a sort of range extender) and high fidelity storage are properly solved. It is a few years ago since I did any quantum information in uni, so I don't know what the current state of things are.

[–] DigitalMus@feddit.dk 2 points 1 month ago (2 children)

For using the quantum teleportation algorithm you first have two establish entangled qubit pair, with one photon at the sender and one at the destination. This process does take the distance over speed of light amount of time. The trick is that you would pre-process this, and decide later when to and what information to encode into the qubit, allowing for "instant" information transfer. Naturally, this requires that you have a very good memory device that keeps the fidelity of the entangled qubits.

[–] DigitalMus@feddit.dk 7 points 4 months ago

Not a search engine, but last week I learned of the European Open Websearch project, which builds a new free and open search index. It should already be ready to try out. Hopefully we will see some search engines implementing this soon.

[–] DigitalMus@feddit.dk 3 points 8 months ago (1 children)

Thought I would mention Guix. I don't know about using it as an OS but just the package manager is so nice to build reproducible software environments (although disclaimer I discovered this myself a few weeks ago). At least as close you can get without including proprietary hardware drivers. Building MPI applications on my laptop and moving them to an HPC cluster with full performance feels like magic.

[–] DigitalMus@feddit.dk 1 points 10 months ago

Cool, can I come over and have a look at your ~~super strong monster magnet~~ Neutron star?

[–] DigitalMus@feddit.dk 2 points 1 year ago (1 children)

The sun's spectrum at the earth surface peaks in the green color range, which should make green the most efficient choice. Although, I wonder why they have to absorb only a single or a narrow band of color.

[–] DigitalMus@feddit.dk 4 points 1 year ago

Without knowing much about psychology, I would imagine separating the mindset into a set of orthogonal axis is pretty difficult and certainly the normal range would probably not follow a normal distribution in each axis. As a result the N-dimensional volume would not be a N-sphere but some complex topological shape. Possibly even consisting of multiple disjointed sets. If any of these assumptions are true then the global point average over the entire space may lie outside many of the "normal" ranges.

[–] DigitalMus@feddit.dk 4 points 2 years ago (1 children)

Imagine there are two balls, a red and a blue. You want to communicate to your friend rolling the only blue ball to them. In a ferromagnet there are only blue balls, in an antiferromagnet the blue and red balls are glued together and in an altermagnet there are both balls but they go in different directions so you just need to orient yourself correctly.

The antiferromagnet can't be used for spintronics, the ferromagnet can but big magnetic field disturb other parts in a circuit.

[–] DigitalMus@feddit.dk 34 points 2 years ago (5 children)

Altermagnets are pretty interesting because their most defining feature is not the magnetic order in the materials. They look like ordinary antiferromagnets where the spins of adjacent atoms point in opposite direction and compensate each other, so no large magnetic fields are created. What differentiate altermagnets from antiferromagnets is how the electrons with different spin behave. When pulling current through altermagnets it will consist of purely spin up electrons along one crystal axis and purely spin down along orthogonal crystal axes. Thus the spin currents have a 'alternating' pattern, giving the name altermagnet. This is primarily exciting for the field of 'spintronics' which is all about creating technologies using spin currents.

Not all altermagnets are equally interesting, many antiferromagnets can be reclassified to altermagnets but they are generally insulating. (fun fact the first ever measured and textbook antiferromaget MnF2 is actually altermagnetic) So materials discovery of new altermagnets is important to find metallic, semi-metallic or even super conducting altermagnets.

[–] DigitalMus@feddit.dk 6 points 2 years ago (1 children)

I feel like I met some recursive endgame boss... I made a penguapplepenguinpenguapplepenguapplepenguin partially from pineapples and penguins and something else I spam combined

[–] DigitalMus@feddit.dk 3 points 2 years ago

0.5% of eluveitie at 1443 minutes, I suppose not too impressive considering 907k monthly listeners. But I'm a varied listener

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