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'The Fabric of the Cosmos'

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    Leading physicist tackles biggest discoveries of 21st century

  • Duration 3:52
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Hi this is fox extract I'm Heather Childers we're talking with author and -- in the PBS now have a series the fabric of the cosmos which is a follow up.

To the elegant universe -- ingredients one of the world's leading physicist.

And in his book he tackles topics like time travel and explaining some of the biggest physics discoveries of the 21 century.

Hi Brian thank you so much for joining happen here something that you just mentioned we've heard quantum physics and can you explain to us exactly what is -- Quantum physics is a body of understanding that was developed during the twentieth century to figure out how molecules and atoms in sub atomic particles work.

And the thing is we found the -- at work in the microscopic -- are completely different.

And anything we experience in everyday life particles can pass through barriers that we would think are impenetrable.

The year is way in which the world has governed by chance probability not certainty.

In the way that we are from -- with in the everyday world.

Completely different from experience.

But demonstrably true because experiments confirm these -- casing -- -- -- microscopic.

World how can that translate into the world.

And which you know you and I live on a daily basis that's a critical question because you could ask yourself should I really care about.

These esoteric things that science is discovering.

And you should.

Because I suspect you have a cellphone and a personal computer as do many one or two or three at all of those devices rely upon quantum physics the technology inside those objects would not exist if scientists had not understood how to manipulate matter on small -- -- integrated circuit.

Comes out of quantum physics so these discoveries which seemed esoteric when they were first brought on line.

Have impacted everybody's life in a profound way.

How house.

When you take it beyond like the computers in the self probably look to the future there are some strange thing we can imagine quantum physics -- -- experiments today.

Are showing that there's a certain kind of teleport Haitian which is possible tell -- dark and being another word for time travel this is travel and space from -- -- place to another without.

Going through the intervening region between these locations without standing in line at -- airport that's exactly right another thing is we can't do this with people obviously but scientists today -- -- according individual particles from one place to another.

Which is the first step toward that.

Possibility in the distant distant future then maybe we could teleport.

Objects microscopic object so you teleport a particle from one area to another.

Does it end up in the same that.

You know waited it began you -- -- changed -- -- get -- that device you want to be pretty certain that you get you're the same person.

And according to the laws of quantum that suggests an identical version of that object is created at the receiving station.

Would I be the first person to step into when these devices you know 101000 years from now we ever crack this and are able to do -- for a man microscopic objects.

I don't think show -- what about time travel kind of -- to the future is something that absolutely.

Is possible Einstein showed us how to do it.

If you want to see what the earth will be like a million years from now.

You build a spaceship you go near the speed of light.

Go out for six months you turned -- to come back six more months that's one year for you -- your one year older.

But time for -- slows down at high speeds so when you step out of that ship it won't be one year.

Later on earth that'll be ten years -- -- hundred your drug billion years later and this is something that is not controversial the only thing is we can't build the ships to go that fast yet.

But as far as the law of physics are concerned time travel to the future is absolutely -- thank you semis -- -- to appreciate it pleasure thank interesting stuff.

And at that is that for -- -- I'm Heather Childress thanks for watching.

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