Lorentz Jr Posted November 18, 2022 Share Posted November 18, 2022 (edited) From the thread Sending an instantaneous signal: 7 hours ago, geordief said: Suppose there was a way to look for entangled particles ... Could we answer by locating the source of the signalling and then finding a source of entangled particles midway between us and them and encoding them? We would be effectively setting up a walkie talkie system between the past and the present Have there been other attempts(in theory) to do this? 6 hours ago, Lorentz Jr said: What kind of source generated a signal and how long the signal took to reach Earth are different questions. Specifically identifying entangled particles is very, very speculative. I don't think anyone has searched for anything like that, although I suppose you could ask the people at SETI.... Using entanglement is also speculative. It's forbidden by relativity, and even quantum mechanics doesn't allow incoherent systems to violate that rule. Faster-than-light communication would require (a) that entanglement does indeed involve such communication between particles (which is still a controversial subject), and (b) that there's an as-yet-unkown way to get around the rules. The short answer is no, no one has the slightest idea of whether or how that could possibly be done. 3 hours ago, swansont said: Quote Using entanglement is also speculative. It's forbidden by relativity No, it’s not. If you wish to discuss it, open your own thread on entanglement, so your misconceptions can be addressed. Could someone please do me a favor and address these misconceptions? I'm afraid I don't understand them. By "using entanglement" I meant using entangled particles to send an instantaneous signal, as the OP had asked about (or, more speculatively, possibly using whatever process underlies entanglement sometime in the future, if such a process exists and we can learn how to use it). Edited November 18, 2022 by Lorentz Jr Link to comment Share on other sites More sharing options...
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