Why can’t people send? | Wired

Let’s face it: No one likes to travel.

Whether they are going to a foreign country for vacation or commuting to work every day, no one actually likes the part they have to travel.Those who say they like to travel may mean they like arrive. That’s because somewhere is really interesting: seeing new things, meeting new people, going to work early so you can go home early and read physics books.Actually travel The part is usually a drag: prepare, rush, wait, rush some more. No matter who says “this is a journey, not a destination”, he obviously doesn’t have to sit in traffic every day, and he has never gotten stuck in the middle seat on a transatlantic flight.

Wouldn’t it be great if there were better ways to go to various places?if you can Appear Where do you want to go without going through all the places in between?

Courtesy of Penguin Random House

For more than 100 years, teleportation has been a fixture in science fiction. Who has never imagined closing his eyes or jumping into a machine to suddenly find a place where he wants to go? Think about how much time you will save! Your vacation can start now, not after the 14-hour flight. We can also reach other planets more easily. Imagine sending colonists to the nearest habitable planet (Proxima Centauri b, four light years away) without spending decades.

But is it possible to transmit? If so, why did it take so long for scientists to make it a reality? Development takes hundreds of years, or can I expect it to become an app on my phone soon? Set the phaser to the stun state, because we will let you understand the physics of teleportation.

Courtesy of Penguin Random House

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If your dream of teleportation is to arrive here at a certain moment, and then arrive at a completely different place at the next moment, then we regret to tell you immediately that this is impossible.

Unfortunately, physics has some very strict rules anything It happened instantly. Anything that happens (effect) must have a cause, which in turn requires the transmission of information. Think about it: In order for two things to have a causal relationship with each other (like you disappear here and you appear elsewhere), they must talk to each other in some way. In this universe, everything, including information, has a speed limit.

Information must spread in space like everything else, and it must be the fastest anything What can travel in this universe is the speed of light. Really, the speed of light should be called the “speed of information” or “the speed limit of the universe”. It incorporates the concepts of relativity and causality, which are the core of physics.

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