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Archive for the ‘time travel’ category: Page 7

Apr 5, 2016

Five ways to travel through time

Posted by in categories: physics, time travel

Travel to the past is probably impossible. But to the future? That’s a different story. Cathal O’Connell considers the feasibility of physics.

In 2009 the British physicist Stephen Hawking held a party for time travellers — the twist was he sent out the invites a year later. (No guests showed up).

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Feb 29, 2016

Time travel a step closer as physicists say we live in a universe-sized ‘flicker book’

Posted by in categories: physics, space, time travel

TIME throughout the universe is like a giant ‘flicker book’ which can be broken into an almost infinite number of separate moments, scientists said today.

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Feb 21, 2016

Hold Up, Did We Just Crack Time Travel?

Posted by in categories: cosmology, physics, time travel

Astrophysicists famously proved Einstein’s theory on the existence of gravitational waves last week. Here’s the less covered part of it all: It might, down the line, bring us closer to moving through time.

A now-famous team of astrophysicists shocked the world Thursday after recording the gravitational waves of two black holes slamming into each other 1.3 billion light-years away.

This detection supports Einstein’s general theory of relativity in a way that revolutionizes scientific understanding of how space and time behave in extreme environments, and astrophysics will never be the same.

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Feb 16, 2016

Engineers, get to work

Posted by in categories: engineering, time travel

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Feb 14, 2016

Do not mess with time: Probing faster than light travel and chronology protection with superluminal warp drives

Posted by in categories: quantum physics, space travel, time travel

ABSTRACT

While General Relativity (GR) ranks undoubtedly among the best physics theories ever developed, it is also among those with the most striking implications. In particular, GR admits solutions which allow faster than light motion and consequently time travel. Here we shall consider a “pre-emptive” chronology protection mechanism that destabilises superluminal warp drives via quantum matter back-reaction and hence forbids even the conceptual possibility to use these solutions for building a time machine. This result will be considered both in standard quantum field theory in curved spacetime as well as in the case of a quantum field theory with Lorentz invariance breakdown at high energies. Some lessons and future perspectives will be finally discussed.

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Feb 12, 2016

We’ve finally found gravitational waves, so can we time travel?

Posted by in categories: cosmology, physics, time travel

Physicists working with a powerful observatory on Earth announced Thursday that they have finally detected ripples in space and time created by two colliding black holes, confirming a prediction made by Albert Einstein 100 years ago.

These ripples in the fabric of space-time, called gravitational waves, were created by the merger of two massive black holes 1.3 billion years ago. The Laser Interferometer Gravitational-Wave Observatory (LIGO) on Earth detected them on Sept. 14, 2015, and scientists evaluated their findings and put them through the peer review process before publicly disclosing the landmark discovery today.

SEE ALSO: Einstein was right: Scientists detect gravitational waves for the first time.

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Feb 5, 2016

Is This Ancient Greek ‘Laptop’ Proof That Time Travel Is Real?

Posted by in categories: computing, time travel

It’s clearly some kind of jewelry or small weapon case, not a freaking laptop.
But just for arguments sake, why would advanced time travelers be using laptops at all? Why not a tablet? Oh god, now they’re going to go over every single ancient depiction of a person looking at a tablet and say it’s from the future. That would have made the library at Alexandria the ancient equivalent to a Best Buy big box store in our time…

Oh god, what have I done?
Too bad I can’t go back in time and…errr.
wink

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Jan 5, 2016

The Secret to Everyday Time Travel Is Simple, Insane

Posted by in categories: particle physics, quantum physics, time travel

Since you first started learning about the world, you’ve known that cause leads to effect. Everything that’s ever happened to or near you has reiterated this point, making it seem like a fundamental law of nature. It isn’t.

It is, in fact, possible for an event to occur before its causal factors have manifested or happened. This isn’t how appliances work — you don’t have to worry about will have having left the oven on — but it is how particle physics works. It’s also the key to explaining how time travel, under the laws of quantum physics, could operate.

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Dec 27, 2015

Could Time Travel Soon Become a Reality? Physicists Simulate Sending Quantum light Particles into the Past

Posted by in categories: evolution, particle physics, quantum physics, time travel

If a time traveler went back in time and stopped their own grandparents from meeting, would they prevent their own birth?

That’s the crux of an infamous theory known as the ‘grandfather paradox’, which is often said to mean time travel is impossible — but some researchers think otherwise. A group of scientists have simulated how time-travelling photons might behave, suggesting that, at the quantum level, the grandfather paradox could be resolved.

The research was carried out by a team of researchers at the University of Queensland in Australia and their results are published in the journal Nature Communications. The study used photons — single particles of light — to simulate quantum particles travelling back through time. By studying their behavior, the scientists revealed possible bizarre aspects of modern physics.

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Dec 20, 2015

Warp drive and wormholes could be used for time travel, says physicist

Posted by in categories: cosmology, space travel, time travel

Older, but interesting idea—


Warp drive and stargate wormholes could be used for time travel to the past. That’s the surprising conclusion that controversial theoretical physicist and author Dr. Jack Sarfatti has reached from his research into dark energy and dark matter.

Hubble image of dark matter ring in galaxy cluster

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