Is time travel possible?

Updated on : December 8, 2021 by Alex Clark



Is time travel possible?

Stepping through time, visiting the past, or leaping into the future - these are concepts so fascinating that they take over one's own mind, pulling on our imaginations with relentless vigor. This could be why we are so willing to believe the recent findings (evidence?) Of a time traveler talking on a cell phone in 1928. This "evidence" can be found in the additional features of a box of Charlie Chaplin DVD and has time. - travel experts reeling.

Imagine the possibilities: would you revisit your childhood? Would you share a thought with Aristotle or a drink with Julius Caesar? Unfortunately, for t

Keep reading

Stepping through time, visiting the past, or leaping into the future - these are concepts so fascinating that they take over one's own mind, pulling on our imaginations with relentless vigor. This could be why we are so willing to believe the recent findings (evidence?) Of a time traveler talking on a cell phone in 1928. This "evidence" can be found in the additional features of a box of Charlie Chaplin DVD and has time. - travel experts reeling.

Imagine the possibilities: would you revisit your childhood? Would you share a thought with Aristotle or a drink with Julius Caesar? Unfortunately, for the moment, these are questions the answer to which you can only imagine. However, great minds have doubted time travel in the past, only to admit that the possibility simply cannot be excluded. In fact, the renowned physicist Stephen Hawking came to this exact conclusion. So, we are here to give you some of the futuristic possibilities with five things you didn't know about time travel.

1- Stephen Hawking claimed that time travel was impossible

One of the many theories of time travel states that the universe will protect itself from creating paradoxes (problems associated with time travel) simply by not allowing time machines to be created. "Machines of all time are likely to self-destruct the moment they are activated," famous physicist Kip Thorne told Scientific American. While the idea of ​​an unintended universe seems a bit far-fetched (one can't help but imagine the invisible forces at work in Final Destination), Stephen Hawking openly subscribed to this hypothesis, deciding that there should be a law prohibiting travel in the world. weather. of the laws of physics. Hawking proposed the "chronological protection conjecture" as that law. In the years after your proposal,

2- The universe may not allow changes when you travel in time

No wonder Hawking once believed that time travel was impossible; there are simply too many paradoxes involved in the whole procedure. The most famous of them, the grandfather paradox, proposes the following riddle: if you traveled in time and killed your grandfather, wouldn't you cease to exist without ever having the opportunity to be born? From its mind-boggling beginnings, the Grandfather Paradox has seen many attempts to satisfy its confusion. Perhaps the most successful came from the American physicist Hugh Everett III, who first proposed the many worlds interpretation (MWI) of time travel. Although it has gone through various revisions, the MWI essentially states that many universes can exist, one for each possible outcome of each possible event. Therefore,

While the MWI theoretically appears to be in agreement with quantum mechanics, it certainly has its share of skeptics and, well, it seems too convenient. However, a more recent model, by physicists Daniel Greenberger and Karl Svozil, allows quantum mechanics time travel along a single timeline while simultaneously overcoming the infamous Grandfather Paradox. According to Greenberger and Svozil, quantum objects exist as multi-component waves, and each wave follows a particular path through space-time.

Time travel may have already occurred and time machines are not necessary ...

In 2005, Greenberger and Svozil discovered that when these waves travel back in time, they interfere destructively, thus preventing something from happening differently than what has already happened. Therefore, if you know the present, you cannot change it: "You kill your grandfather again, but you would arrive after he left the room, you would not find him or you would change your mind," Professor Greenberger told the BBC.

3- It is possible that a time traveler has already visited us

In 2000, a person who identified himself as John Titor began visiting online science fiction discussion boards, claiming to be a military time traveler since 2036. Appearing, and then disappearing, without a trace, Titor became involved and entertained online. public, providing numerous predictions and details about time travel and the future. According to Titor, the US civil war was to break out after the 2004/05 US presidential elections because of individual "orders and rights." Titor made predictions that civil liberties would be lost rather than national security. He also claimed that by 2015, the civil war will end when Russia launches nuclear strikes against various US targets, after which the US will retaliate,

Obviously, Titor's claim of a civil war was never made, and neither were many other claims he made at the time. Titor, however, indicated that the many-worlds interpretation of time travel was correct, thus stating that the timeline from which he had ultimately traveled would differ from ours, rendering his claims infalsifiable. Despite the obvious sense of deception in this story, it certainly makes an interesting read. Some of Titor's other predictions: The United States will make war on Iraq, claiming that Iraq has nuclear weapons (this prediction was made before 9/11 and any talk about the war with Iraq); war will break out between Israel and its Arab neighbors, and weapons of mass destruction will be used; after 2004, Due to an international conflict, the Olympic Games will be canceled. And perhaps the prediction that had the most impact:

4- Time travel may not require a time machine

Most of the models that explain time travel require a machine that can produce some kind of exotic matter with negative density. However, does this exotic matter exist and what exactly is it? Well, the best way to understand negative energy density is to observe black holes.

Black holes generate intensely strong gravitational fields, so strong that they could actually bend space-time itself. Theorist Roy Kerr postulated that time travel could be possible if you could enter a black hole and exit through a white hole on the other side. While a black hole pulls everything towards it, a white hole would essentially push everything away from it, using, you guessed it, matter with negative energy density. Although it sounds like a peach theory, unfortunately, all known forms of matter have positive density. However, quantum field theorists predict that exotic matter exists, only that it has not yet been produced and appears to be available in quantities too small for real-time travel. Don't worry yet;

Time travel could be happening right now ...

In 2007, physicist Amos Ori from the Technion Israel Institute of Technology developed complicated mathematical equations that described a set of ideal gravitational conditions that would allow spacetime to spontaneously bend and spin on itself to form a donut. In this scenario, you don't need a time machine. Space-time becomes the necessary machine to travel in time. If a person could go around the donut, he could hypothetically travel back in time with each turn.

5- Time travel could begin with the Large Hadron Collider

When Hawking thought time travel was impossible, one of his defining arguments was that we haven't seen time travel tourists yet. If time travel were possible, Hawking argued, "Why haven't tourists from the future invaded us?" Hawking later responded to his own question by saying that spacetime must warp in a certain way to allow time travel, and if we can't warp spacetime that way into the future, time travelers couldn't. travel backwards. to an earlier point (think of the gravity donut example above). So basically, one could travel back in time only to the point of creation of the first time portal. Okay, great, but what does that have to do with the Large Hadron Collider?

Well, in 2008, the European Organization for Nuclear Research (known as CERN) unveiled its $ 9 billion (USD) Large Hadron Collider (LHC), the most powerful atom smasher ever known. The LHC is a marvel of modern technology and is said to be the most complicated thing humans have ever built. It measures 17 miles in circumference, sits 574 feet underground, and facilitates the head-on collision of protons traveling close to the speed of light. In fact, the LHC is so powerful that Russian mathematicians Irina Aref'eva and Igor Volovich claim that it sets the conditions for the creation of a wormhole, providing a potential doorway for unexpected visitors from the future. Although the door is probably too small for humans to go through, Is it possible that we will start seeing miniature messengers from tomorrow? Only time will tell.

Means

  • telegraph.co.uk
  • pbs.org
  • mkaku.org
  • en.wikipedia.org
  • newscientist.com
  • spacedaily.com
  • jpost.com
  • science.howstuffworks.com
  • hawking.org.uk
  • vnunet.com
  • darkroastedblend.com

Written by Jacob Franek.

Time travel is one of my favorite topics! I have continued to study this fascinating concept over the years. We all travel in time. During the last year, I advanced a year and so have you. Another way to put it is that we travel in time at the rate of 1 hour per hour.

But the question is, can we travel in time faster or slower than "1 hour per hour"? Or can we really travel back in time, going back, say 2 hours per hour, or 10 or 100 years per hour?

It is amazing to think about traveling in time. So, here are some mind-blowing facts about time travel.

  1. Time is the only
Keep reading

Time travel is one of my favorite topics! I have continued to study this fascinating concept over the years. We all travel in time. During the last year, I advanced a year and so have you. Another way to put it is that we travel in time at the rate of 1 hour per hour.

But the question is, can we travel in time faster or slower than "1 hour per hour"? Or can we really travel back in time, going back, say 2 hours per hour, or 10 or 100 years per hour?

It is amazing to think about traveling in time. So, here are some mind-blowing facts about time travel.

  1. Time is the only dimension that we can travel in only one direction-

There are four basic dimensions. Three of them are spatial. These are often referred to as the height, width, and depth. It can travel in two directions in any of these dimensions. It can have an almost infinite number of positions within the three dimensions.

The fourth dimension is time. But we are much more limited in the way we travel through this fourth dimension. We cannot travel backwards. It is the only dimension in which we can only travel forward. Many dreamers have wondered what it would be like to be able to travel back in time, but based on our current knowledge of the laws of physics; Such a journey is only possible in dreams and in our wildest fiction.

2. Time travel may not require a time machine.

Most of the models that explain time travel require a machine that can produce some kind of exotic matter with negative density. However, does this exotic matter exist and what exactly is it? Well, the best way to understand negative energy density is to observe black holes.

Black holes generate intensely strong gravitational fields, so strong that they could actually bend space-time itself. Theorist Roy Kerr postulated that time travel could be possible if you could enter a black hole and exit through a white hole on the other side. While a black hole pulls everything towards it, a white hole would essentially push everything away from it, using, you guessed it, matter with negative energy density. Although it sounds like a peach theory, unfortunately, all known forms of matter have positive density. However, quantum field theorists predict that exotic matter exists, only that it has not yet been produced and appears to be available in quantities too small for real-time travel. Don't worry yet;

3. Time does not pass the same way everywhere

Time may seem to slow down when you're in a boring meeting or the days before Christmas, but that's just wishful thinking, right?

It turns out that time passes differently at different altitudes. Even a small difference in altitude can be detected with sufficiently sensitive equipment. A height difference of just 12 inches can make a difference in the speed at which time passes.

If you live in Mile-High City, time passes faster for you than if you live in Death Valley.

4. Time travel could begin with the Large Hadron Collider.

When Hawking thought time travel was impossible, one of his defining arguments was that we haven't seen time travel tourists yet. If time travel were possible, Hawking argued, "Why haven't tourists from the future invaded us?" Hawking later responded to his own question by saying that spacetime must warp in a certain way to allow time travel, and if we can't warp spacetime that way into the future, time travelers couldn't. travel backwards. to an earlier point (think of the gravity donut example above). So basically, one could travel back in time only to the point of creation of the first time portal. Okay, great, but what does that have to do with the Large Hadron Collider?

Well, in 2008, the European Organization for Nuclear Research (known as CERN) unveiled its $ 9 billion (USD) Large Hadron Collider (LHC), the most powerful atom smasher ever known. The LHC is a marvel of modern technology and is said to be the most complicated thing humans have ever built. It measures 17 miles in circumference, sits 574 feet underground, and facilitates the head-on collision of protons traveling close to the speed of light. In fact, the LHC is so powerful that Russian mathematicians Irina Aref'eva and Igor Volovich claim that it sets the conditions for the creation of a wormhole, providing a potential doorway for unexpected visitors from the future. Although the door is probably too small for humans to go through, Is it possible that we will start seeing miniature messengers from tomorrow? Only time will tell.

5. The universe may not allow changes when you travel through time.

No wonder Hawking once believed that time travel was impossible; there are simply too many paradoxes involved in the whole procedure. The most famous of them, the grandfather paradox, proposes the following riddle: if you traveled in time and killed your grandfather, wouldn't you cease to exist without ever having the opportunity to be born? From its mind-boggling beginnings, the Grandfather Paradox has seen many attempts to satisfy its confusion. Perhaps the most successful came from the American physicist Hugh Everett III, who first proposed the many worlds interpretation (MWI) of time travel. Although it has gone through various revisions, the MWI essentially states that many universes can exist, one for each possible outcome of each possible event. Therefore,

Source :

  1. https://medium.com

2. Travel in time

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