Superluminal Time Travel + Time Warp Challenge Answer

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By choosing the right path and the right reference frames, any superluminal motion can lead to information or objects returning to their origin before they depart. Matt O’Dowd will show you how to navigate such a path.

Time Warp Challenge Challenge Question - Race to a Habitable Exoplanet 1:44

The Geometry of Causality 1:39

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Time Crystals! Space Time Journal Club

Written and Hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Grayson Blackmon

And the Space Time Challenge Winners are …

Carlo Bernaschina
Werner van Alphen
Noel Segura
Gadrat Florent
Riley Fitzgerald
The combined classroom efforts of Alex Summerfield (w. Ronita, Habiba, Abbie, Daina, Joe, Hugh, Sharif, Johansen, Yahya)

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[dionbaillargeon]

PBS Space Time: my favorite show I don't understand.

[jeremyleyland]

Bartender says "We don't sever faster then light particles here". A tachyon walks into a bar.

[haydenish]

"It's possible to receive a reply to your message before the message is sent."

I must be using a tachyonic anti-telephone when I ask girls out

[qaedtgh]

Whenever I watch these I start out understanding what he's talking about. Then I think I know what he's talking about. Then I pretend that I know what he's talking about. Then I confess that I have no idea what he's talking about.

[ashleycarvell]

Kudos to the person who makes all these diagrams... phenomenal job!

[DataJuggler]

This video reminds me of a joke: Two cows are talking and the first says "Most people abbreviate PI to 3.141592 but in reality the decimals go on for infinitum". The second cow replies "Moo". I feel like the second cow after watching this video.

[VS-etpn]

"before Albert showed us the way" love it

[captainmidnight]

Enough talk! Lets build that ship and really see what happens!

[nastropc]

7:31 "The Paradox appears to materialise out of nowhere and then proceeds to split in two"
Woah, Prof Matt just scienced the Picard Manoeuvre!

[jackemled]

"My ship is _so_ fast, that it can beat _itself_ in a race!"

[EugeneKhutoryansky]

If you have a valid idea for building a time machine, you will most likely be getting a visit from your future self, warning you to never build it.

[cahal]

"We are temporal creatures, our experience of the universe is a thing that emerges from the forward causal evolution of the matter that we're composed of."

Thought this was such an articulate way of describing reality.

[robj]

He has a unique way of sounding interesting while simultaneously making you feel like you have no friggin idea what he just said.

[stillatwork]

You can't do a lorentz transformation between a ship in a warp field and one in normal space time, thats kind of the whole point. In a warp field you are effectively removed from the rest of space time until you reach your destination. No light or any information travels between the two points. Because for spacetime itself the speed of causality is infinity as present in blackholes an inflation period where spacetime streached at a rate greater then C. So you can't change reference frames from inside a warp field to outside one using mathematics designed for a normal space time, not more then a photon can escape across the event horizon outside of a black hole. The warp field solution to get around C is not just to get fast, its to get around the limit of a lorentz transformation control universe where FTL is indeed impossible. It does this by not violating any rules but by placing the mass it wants to transport in a kind of bubble universe and then move the bubble. The only interaction between the two areas is not light or any particle but vacuum energy (so possibly virtual particles) which quantum field theory says exists, at least partly, due to the wave particle duality. Basically we can't mathematically model an FTL ship correctly because we don't have a theory of everything that balances out relativity and quantum mechanics. Thus this shouldn't be a way to disprove FTL by its nature, rather it shows a flaw in our current theories, a flaw that is very well known. Or in other words, we can't model FTL very well until we at least figure out Dark Energy as Dark Energy probably involves vacuum energy of some kind on the macro scale but using the current equations the numbers are widly off. This is just another manifestation of that discrepancy between the two models.

[gonaldocr]

Any chance we can get a string theory video?

[viniciusdesouzamaia]

this show is just awesome. I would love to see some history on the experiments behind these theories, trying to understand how these strange notions were originally devised.

[VictorsOtherVector]

Literally sent my solution an hour ago! Dang, better get on my FTL spaceship so I can submit it a little earlier

[BlueSkiesTruthRadio]

"In the olden days, before Albert showed us the way..."

Beautiful

[carlsson]

I have no idea what the fuck he is saying
But i like it

[donaldjmccann]

About 20 years ago I was writing a screenplay about sending a message to the past. I emailed Kip Thorne (who was about 58 at the time) to ask him if my messaging idea was possible. He replied "No"...I then replied to him: "That's not what you told me at your 65th birthday party!" (True story)