Faster than Light Particles Could Exist After All, New Study Says
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Published 2024-07-30
Physicists recently published a new paper noting that tachyons, particles that move faster than the speed of light, can exist after all. Is this just more hype over nothing, or is this science fiction becoming reality? What do these tachyons have to do with wormholes and warp-drives? Let’s have a look.
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The paper is here: journals.aps.org/prd/abstract/10.1103/PhysRevD.110…
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All Comments (21)
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This video comes with a quiz which you can take here: quizwithit.com/start_thequiz/1722233290908x8699508…
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The bartender says, "We don't serve tachyons." A tachyon enters the bar.
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I read decades ago that tachyons only ever travel faster than the speed of light, and cannot cross the barrier that would cause them to travel slower than the speed of light.
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15 years ago, I asked a worker in a Walmart parking lot how do I get into the store. He said, "Go through that door that says Exit." I've been stuck inside ever since. Help.
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Reminds me of: There once was a girl named Bright Who could travel faster than light. She left one day, in a relative way, and returned on the previous night !
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photon: does exist, but doesn't like to be observed tachyon: doesn't mind to be observed, but doesn't exist
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Everyone in science fiction knows the tachion cannon, it hits the target before you pull the trigger, right? 🤣
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2:25 - You have to be a "firend" in order to go backward through time? It all makes sense now. 😉
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[Checks notes] 😂😂😂
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I thought the issue with tachyons, FTL travel, and negative energies is that they would emit a kind of "Cherenkov radiation" continuously as they travel. This radiation would reduce the particles energy. This would actually cause the particle to increase in velocity, emitting more radiation and therefore causing infinite acceleration.
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tldr: introduce time-direction into your parity models, suddenly observer discrepancies of ftl particles can be resolved. since this time-direction quantity exists it could also be used to negate other "impossible negative energies", and thus some things which we say can't exist, could. Of course, this has no bearing on whether anything can cross the speed of light, or if we can measure those particles and use them.
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Ekert, Dragan et al papers exploring the consequences of the existence of superluminal observers were alluding these consequences may look like quantum mechanical effects. They do in a one dimensional space (which iirc was the first claim in their series of papers on the subject)
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Particles change state and are subject to interactions with other things, so they experience time in that respect. If two observers travelling at different speeds interact with a tachyon, they may disagree about the order of events. Thats fine for sub-light particles, but for tachyons wouldnt the spacetime interval also be different? If FTL communication and travel are possible, what prevents paradoxes?
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Another thing that Star Trek predicted? Woah.
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Nice graph Sabine, especially at 2:26 when it says "Your Firend."
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I have learned more from your videos, the ones that aren't over my head, this was great. Thank you.
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"I alway have been, and always will be, your firend." (I appreciate Dr. Hossenfelder very much, just couldn't resist.)
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In my opinion: similar to supersonic airplanes cannot be heard if it is moving towards to the observer, superluminous particles can not be observed by an observer, until it passed near the observer. Like this nothing is broken, and no reverse time. But boy after it passes the observer an immense broad spectrum light boom will follow
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I really appreciate how you use the word appear.
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Good stuff. Thanks Sabine! 🙂
