Recent comments in /f/space

Adeldor t1_j5pkthe wrote

While the teleportation is instantaneous, I don't think there's any way to bypass the need for ancilla to be transported "classically," which are required for the Bell measurements at the receiver.

And there's still the causality problem (manifest here as "information causality" - PDF). Of course, one should never say never, but it seems there's always a fundamental roadblock when it comes to FTL, regardless of the path taken.

1

space-ModTeam t1_j5pj3ru wrote

Hello u/DesignCommercial1022, your submission "what determines which body, genes and parents i will have?" has been removed from r/space because:

  • It is not related to space.

Please read the rules in the sidebar and check r/space for duplicate submissions before posting. If you have any questions about this removal please message the r/space moderators. Thank you.

1

[deleted] t1_j5piro1 wrote

Thanks for having a crack, that article is a touch over my head as well, but I have found this article which explains an abiotic process for ethanol synthesis, which may not be the one that is happening on the observed planet, but at least I now know that ethanol is possible to be synthesised by abiotic means, whereas when I initially read the OP I was thinking they found sure signs of life for a minute there!

1

DonaldFauntelroyDuck t1_j5ph0zq wrote

I do understand this a bit different and would expect that this would be actually possible. According to the relativity theory the point is that the "spooky entaglement" happens at identical times everywhere.

Maybe this paper is better:

https://jqi.umd.edu/news/first-teleportation-between-distant-atoms

or this

https://www.engadget.com/fermilab-quantum-teleportation-report-221002594.html?guccounter=1&guce_referrer=aHR0cHM6Ly9kdWNrZHVja2dvLmNvbS8&guce_referrer_sig=AQAAAHDBA8t0ynTc7F_k2JnVOXRUIpUzqyyj6BpK9DaTzOdvmk8vuKSctX_ht_-IcN0TKwrrHOjDoS1-qEqAX-KVang2lQi9Sj0c0p3VyhlgiwMLK434JEf0guL7cBMpnQhja0vtR8N0LNGXNXnsvFjOJcNPnY2mAltkGs5yJGxlGIqn

"teleportation" is in my understanding "timeless" as it happens between entagled entities.

1

Adeldor t1_j5pfez1 wrote

My understanding here is that the ancilla are themselves limited by the speed of light, thus limiting communication speed to the same, and this experiment's goal was to (dis)prove the apparent instant simultaneous collapse. But I'm very open to correction here.

1

Bipogram t1_j5pdgoh wrote

Here are some of the best models we have of Jupiter's near-core:

https://arxiv.org/pdf/1812.07436.pdf

p12 allows for both a sharp discontinuity and a gradual 'fade' from metallic hydrogen to rock. The data we have cannot distinguish between those models.

"The existence of a diluted core, or a steep heavy-element gradient inside Jupiter is actually consistent with formation models of Jupiter (see section 4.3 for details). Giant planet formation models in the core accretion scenario (e.g., Pollack et al., 1996) suggest that once the core mass reaches ∼ 1 − 2M⊕ the accreted solid material (heavy elements) vaporise and remain in the planetary envelope (e.g., Stevenson, 1982). This leads to a structure in which the deep interior is highly enriched with heavy-elements, with no sharp transition between the core and the inner envelope (e.g., Helled & Stevenson, 2017 and references therein)."

1

DonaldFauntelroyDuck t1_j5pcg2g wrote

My understanding of


In the second part of the paper, Schrödinger showed that an experimenter, by a suitable choice of operations carried out on one member of an entangled pair, possibly using additional ‘ancilla’ or helper particles, can ‘steer’ the second system into a chosen mixture of quantum states, with a probability distribution that depends on the entangled state.

Is that actually you can change one system by changing the other.

1