Physics Explains How to Build a Time Machine Using This Simple Construction


The concept of time travel has always captured the imagination of physicists and laypersons alike. But is it really possible? Of course it is. We’re doing it right now, aren’t we? We are all traveling into the future one second at a time.

But that was not what you were thinking. Can we travel much further into the future? Absolutely. If we could travel close to the speed of light, or in the proximity of a black hole, time would slow down enabling us to travel arbitrarily far into the future. The really interesting question is whether we can travel back into the past.

See also: ‘Future Man’ Makes ‘Doctor Who’ Time Travel Look Weak AF

I am a physics professor at the University of Massachusetts, Dartmouth, and first heard about the notion of time travel when I was 7, from a 1980 episode of Carl Sagan’s classic TV series, Cosmos. I decided right then that someday I was going to pursue a deep study of the theory that underlies such creative and remarkable ideas: Einstein’s relativity. Twenty years later, I emerged with a Ph.D. in the field and have been an active researcher in the theory ever since.

Now, one of my doctoral students has just published a paper in the journal Classical and Quantum Gravity that describes how to build a time machine using a very simple construction.

Closed Time-Like Curves

Einstein’s general theory of relativity allows for the possibility of warping time to such a high degree that it actually folds upon itself, resulting in a time loop. Imagine you’re traveling along this loop; that means that at some point, you’d end up at a moment in the past and begin experiencing the same moments since, all over again — a bit like deja vu, except you wouldn’t realize it. Such constructs are often referred to as “closed time-like curves” or CTCs in the research literature, and popularly referred to as “time machines.” Time machines are a byproduct of effective, faster-than-light travel schemes, and understanding them can improve our understanding of how the universe works.

time loop
Here we see a time loop. Green shows the short way through wormhole. Red shows the long way through normal space. Since the travel time on the green path could be very small compared to the red, a wormhole can allow for the possibility of time travel.

Over the past few decades, well-known physicists like Kip Thorne and Stephen Hawking produced seminal work on models related to time machines.

The general conclusion that has emerged from previous research, including Thorne’s and Hawking’s, is that nature forbids time loops. This is perhaps best explained in Hawking’s “Chronology Protection Conjecture,” which essentially says that nature doesn’t allow for changes to its past history, thus sparing us from the paradoxes that can emerge if time travel were possible.

Perhaps the most well-known amongst these paradoxes that emerge due to time travel into the past is the so-called “grandfather paradox” in which a traveler goes back into the past and murders his own grandfather. This alters the course of history in a way that a contradiction emerges: The traveler was never born and therefore cannot exist. There have been many movie and novel plots based on the paradoxes that result from time travel — perhaps some of the most popular ones being the Back to the Future movies and Groundhog Day.

Exotic Matter

Depending on the details, different physical phenomena may intervene to prevent closed time-like curves from developing in physical systems. The most common is the requirement for a particular type of “exotic” matter that must be present in order for a time loop to exist. Loosely speaking, exotic matter is matter that has negative mass. The problem is negative mass is not known to exist in nature.

Caroline Mallary, a doctoral student at the University of Massachusetts Dartmouth has published a new model for a time machine in the journal Classical and Quantum Gravity. This new model does not require any negative mass exotic material and offers a very simple design.

Mallary’s model consists of two super long cars — built of material that is not exotic, and have positive mass — parked in parallel. One car moves forward rapidly, leaving the other parked. Mallary was able to show that in such a setup, a time loop can be found in the space between the cars.

An animation shows how Mallary’s time loop works. As the spacecraft enters the time loop, its future self appears as well, and one can trace back the positions of both at every moment afterwards. This animation is from the perspective of an external observer, who is watching the spacecraft enter and emerge from the time loop.

So Can You build This in Your Backyard?

If you suspect there is a catch, you are correct. Mallary’s model requires that the center of each car has infinite density. That means they contain objects — called singularities — with an infinite density, temperature, and pressure. Moreover, unlike singularities that are present in the interior of black holes, which makes them totally inaccessible from the outside, the singularities in Mallary’s model are completely bare and observable and, therefore, have true physical effects.

Physicists don’t expect such peculiar objects to exist in nature, either. So, unfortunately, a time machine is not going to be available anytime soon. However, this work shows that physicists may have to refine their ideas about why closed time-like curves are forbidden.

WIKILEAKS: CIA’s Most Secret Weapon Is Time Machine From Vatican. 


Author Alfred Lambremont Webre explains secret programs.

 wikileaks  cia s most important tool  access to travel through time and space provided by the vatican

CIA’s most important tool, access to travel through time and space provided by the Vatican. Following the Wikileaks Vault7 release of documents revealing the CIA hacking tools used to spy on citizens via smartphones and smart TVs, the whistleblowing agency has forgotten to include the CIA’s most important tool, access to travel through time and space provided by the Vatican.

Author Alfred Lambremont Webre, who has written many books on time travel told the told Daily Star: “This leaked WikiLeaks information does not include the secret programs that permit humans to travel backward and forwards in time.”Webre claims that the CIA’s time travel technology known as “quantum access”, was provided to them by the Vatican back in the 1960’s. He also says that the Quantum Access is a deep secret within the hidden government that Wikileaks have chosen not to reveal.

Watch the video. URL:https://youtu.be/hbqYi1s-UBE

 

How Much Energy Would You Need to Power an Actual Time Machine?


There are two hypotheses for time travel that are most popular: wormhole tunneling and cosmic strings. A wormhole is a hypothetical, bi-directional tunnel connecting two space-time locations.

Physicist Michio Kaku doesn’t entirely rule this possibility out, but he cautions that powering a time machine to travel in this way is beyond human capabilities right now, and would demand either negative energy or the energy of a star.

 

Physicist Brian Greene, a string theory expert, doubts that this kind of approach could ever work.

The other popular hypotheses focuses on cosmic strings – thin energy tubes that theoretically stretch all the way across the Universe, which is continually expanding.

Some predict that these narrow spaces, holdovers from the earliest days of the cosmos, contain tremendous amounts of mass. This mass would allow the strings to warp whatever space-time surrounds them.

Princeton astrophysicist J. Richard Gott points out that cosmic strings are either in the shape of loops without ends or are infinite. If two such strings were configured the right way, they might bend space-time in a way that could allow for time travel, in theory.

However, according to Gott, this would be capable only for a “super civilisation” much higher on the Kardashev scale.

 Bill Nye answers this question for kids by referring to heat and energy which always spread out – entropy.

Without outside intervention, heat will not spontaneously concentrate somewhere. Instead, it will disperse towards cooler places.

What does this have to do with time travel? When something spreads outward and moves across a distance, it does so over time.

This, he says, means that time and the spreading out of energy are closely related. It is this intimate connection that prevents us from building time machines.

Source:http://www.sciencealert.com