How Entanglement-Generating Satellites Will Make the Quantum Internet Global
technologyreview.com
technologyreview.com
now i know what will supplant bitcoin. Quantum ASIC entanglement miners - that is the future! Like with wine, the older the entangled ensemble, the more pricier it will be.
That understanding could, of course, completely change at any time.
Unfortunately that is not true. The transportation of information is still limited by the speed of light as you cannot transmit causal information via the collapse and subsequent measurement of the states of entangled particles.
For example, a ship travels to a nearby star, at near c. It gets there almost immediately in its time, and it takes 4 years in out time. But once it is there and is not moving relative to us, ftl communication doesn't violate anything. Or at least I can't image a scenario how could it as long as you can only transmit with that rule.
Unfortunately we can only test collapse in the same( practically ) reference frame. You know what would be interesting; measuring if the collapse is really instantaneous, if the two parties are moving away from each other at significant fractions of c. Maybe it isn't and that solves the problem. Or maybe collapse stops working if one party is moving very fast.
Now, my idea works if you assume that the collapse is instantaneous, it doesn't travel at all. Therefore the logic that the equations show that the information ends in the past doesn't apply.
One benefit of this approach I can see is that you don't, in theory, need transmitters and receivers to be in line of sight for a clear signal. If you are doing standard radio transmissions, it helps if there isn't a planet between you and the transmitter. With entanglement equipment on both ends, this is irrelevant.
You will also not be bothered by signal degradation. The real head-scratcher of quantum entanglement lies in that it works over any distance. The 'transfer' of state between particles is identical, whether the twin is sitting 1 meter or a million light years away.
But as the other commenters mentioned, you are still very much bound by the speed of light. So propagating state changes between entangled particles separated by 1 light year, will still take 1 year.