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Quantum time machine 'allows paradox-free time travel'
Telegraph ^ | 7/22/10 | Tom Chivers

Posted on 07/26/2010 1:28:23 AM PDT by LibWhacker

Quantum physicists at the Massachusetts Institute of Technology believe it is possible to create a time machine which could affect the past without creating a "grandfather paradox".

Scientists have for some years been able to 'teleport' quantum states from one place to another. Now Seth Lloyd and his MIT team say that, using the same principles and a further strange quantum effect known as 'postselection', it should be possible to do the same backwards in time. Lloyd told the Technology Review: "It is possible for particles (and, in principle, people) to tunnel from the future to the past."

(Excerpt) Read more at telegraph.co.uk ...


TOPICS: Science
KEYWORDS: machine; physics; postselection; quantum; quantumcomputing; quantummechanics; teleportation; time; timemachine; timetravel

1 posted on 07/26/2010 1:28:28 AM PDT by LibWhacker
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To: LibWhacker

The world gets stranger every day...


2 posted on 07/26/2010 1:36:57 AM PDT by The Magical Mischief Tour
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To: LibWhacker

Let me know when I get a time machine for $795 at Best Buy....


3 posted on 07/26/2010 1:37:55 AM PDT by freebilly (No wonder the left has a boner for Obama. There's CIALIS in soCIALISt....)
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To: LibWhacker

I appreciate the science, but my first thought was — boy, if I could go back 20-30 years in time and buy MSFT, INTC and some other stocks...


4 posted on 07/26/2010 1:56:07 AM PDT by SmartInsight (Bad officials are elected by good citizens who do not vote. ~ G. J. Nathan)
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To: LibWhacker
The article is cheapened by the "Back to the Future" still. Why is it now "obligatory" for supposedly serious science articles to include pop culture references?

There are those that say that if time travel was possible, we would already have seen visitors from the future. Then again, our current world must seem so prehistoric and harsh to peoples of the future. After all, if it were possible today to travel back to say, the Middle Ages, would anybody actually want to go there?

5 posted on 07/26/2010 2:31:24 AM PDT by SamAdams76 (I am 29 days away from outliving Francis Gary Powers)
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To: LibWhacker

After the terribly stressful last six weeks and corresponding 20/20 hindsight, I’M IN. Where do I sign up??


6 posted on 07/26/2010 2:34:52 AM PDT by pillut48 ("Now is the time that tries men's souls...")
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To: LibWhacker

hype. vaporware


7 posted on 07/26/2010 2:36:13 AM PDT by 4rcane
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To: SamAdams76

Someone gave an interesting insight into the problem with time travel.

When you go into the past or future, the physical space around you isn’t still. The universe is expanding, the Sun tugs the Solar System at breath-taking speed into the Milky Way, which too is in rapid motion. One second of time travel implies a change in your physical position to such an extent that you would be over a million miles away from where you were in the “present”.

Interesting, eh?


8 posted on 07/26/2010 2:41:02 AM PDT by James C. Bennett
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To: SamAdams76

I’d LOVE to go back to ancient Rome. But then I remember there is no way I could pass myself off as a Roman citizen and would probably end up enslaved or tossed to lions.


9 posted on 07/26/2010 2:45:47 AM PDT by LibWhacker (America awake!)
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To: The Magical Mischief Tour

And harder to keep up with! I used to be ahead of the curve on almost everything, could always see a use for every new piece of technology that came along. But now I can’t. I mean, what’s the use of Twitter? Or music on your phone?


10 posted on 07/26/2010 2:51:30 AM PDT by LibWhacker (America awake!)
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To: James C. Bennett
I've thought of the same thing. Even the rotation of the earth must come into play. For example, if I could time travel to 12 hours ago, my physical location might well be somewhere in Asia (not even considering the variables you just mentioned). So any "time travel machine" would have to also make the necessary corrections for physical location - not only in the universe but for movements in the galaxy, solar system and even the rotation of the earth (and the shifting of continental shelves).

The more you think about time travel, the more difficult and complex it becomes.

11 posted on 07/26/2010 2:51:56 AM PDT by SamAdams76 (I am 28 days away from outliving Francis Gary Powers)
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To: James C. Bennett
-- One second of time travel implies a change in your physical position to such an extent that you would be over a million miles away from where you were in the "present". --

Except the speed limit of "c" is on the order of 190,000 miles per second.

Plus there is the relativistic issue of choosing the supposedly stationary frame of reference. How does the time travel machine "know" that?

12 posted on 07/26/2010 3:13:38 AM PDT by Cboldt
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To: SamAdams76

13 posted on 07/26/2010 3:18:06 AM PDT by ClearCase_guy
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To: LibWhacker
Paradox-free...

Isn't that what Obie's healthcare bill promised???

14 posted on 07/26/2010 3:19:45 AM PDT by gov_bean_ counter (Sarah Palin - For such a time as this...)
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To: Cboldt

Maybe it was an hour, LOL!

I didn’t realise that error. Perhaps it could be corrected with an idea of distance, rather than velocity? Heh heh!


15 posted on 07/26/2010 3:23:21 AM PDT by James C. Bennett
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To: LibWhacker
Of course, being able to travel backwards in time means that there must be a fixed future from which to travel from the perspective of the "now" in that previous time.

Very Presbyterian, lol.

16 posted on 07/26/2010 3:30:23 AM PDT by RegulatorCountry
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To: James C. Bennett

I think then you should use a spaceship of some sort. With computers we should be able to calculate where in this solar system we would be and what part of the galaxy and what part of the universe, etc. By the time time travel was actually possible that would likely be the best way.


17 posted on 07/26/2010 3:40:04 AM PDT by aft_lizard (Barack Obama is Hugo Chavez's poodle.)
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To: SmartInsight
if I could go back 20-30 years in time and buy MSFT, INTC and some other stocks...

Mine too but then when I arrived back here, the Feds and the IRS would probably be waiting in my driveway......

18 posted on 07/26/2010 3:48:41 AM PDT by Hot Tabasco (Peanut butter was just peanut butter until I found Free Republic.........)
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To: LibWhacker

Maybe our mess around us is the result of some Liberal time travelers.....yeah!!That’s the ticket....


19 posted on 07/26/2010 3:53:24 AM PDT by mo
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To: LibWhacker

Been there, done that.

Literally.


20 posted on 07/26/2010 4:17:17 AM PDT by Eye of Unk ("In a time of universal deceit, telling the truth becomes a revolutionary act" G.Orwell)
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To: LibWhacker

Who wrote this piece? John Titor?


21 posted on 07/26/2010 4:18:00 AM PDT by BuffaloJack (Obama, BAD for AMERICA.)
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To: gov_bean_ counter

I want to travel into the future so I can get some of that free medical care. I went to the local hospital and said “I want some of that free medical care” and they told me not until 2014.


22 posted on 07/26/2010 4:30:22 AM PDT by decisis
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To: LibWhacker
"It is possible for particles (and, in principle, people) to tunnel from the future to the past."

Don't you just love modern physics! If the math works ("and, in principle, people") then it is true! Never mind that the math works for "light is a wave" and at the same time, the math works for "light is a particle". Of course, sometimes it is necessary to throw 11 dimensions into the equation to get it to come out correctly. Kind of like cheating?

23 posted on 07/26/2010 4:38:44 AM PDT by BwanaNdege ( "Hapana Obama")
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To: Cboldt; James C. Bennett

Jimmy obviously got his units of measurement, but it is interesting to recall that we are moving at very great speeds. Trying to figure out the effects of our inertia on a time traveling particle would be present several interesting paradoxes. The universal frame of reference sorta means that Galileo was wrong, and the Catholic Church was correct.

(The Catholic Church did not teach the Earth was at the center of a shell of spheres; that was Johannes Kepler, AFTER Galileo, trying to make sense of heliocentrism. The Catholic Church’s position was NOT that the Earth was at the center of the universe, but that the universe was so vast as to approach infinity, and that therefore, any arbitrary point might be regarded as the center of the universe. By Keppler’s time, the Church was regarded as wrong, inasmuch as the Earth revolved around the Sun, rather than the other way around. (And of course, later, that the sun revolved around the Galaxy, the galaxy around teh supercluster...) But the stationary frame of reference, taken to the extreme that one cannot suppose any inertia, would argue that it is not more correct to say that the Earth revolves around the Sun than to say that the Sun revolves around the Earth, bringing us back to exactly Cardinal Nicusa’s “doctrine.”


24 posted on 07/26/2010 4:53:44 AM PDT by dangus
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To: SamAdams76
After all, if it were possible today to travel back to say, the Middle Ages, would anybody actually want to go there?

Definitely. I would imagine that if time travel were possible that the crown that Jesus fed with loaves and fish would be entirely composed of people from the future!

The ability to directly observe history (and get the liberal historian's interpretation out of the way) would be such a huge draw that the past would be crowded with time travelers.

25 posted on 07/26/2010 4:57:30 AM PDT by whd23 (Every time a link is de-blogged an angel gets its wings.)
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To: Cboldt; James C. Bennett

Nicusa is the wrong name in my last post. It’s Cardinal Nicolas diCusa.


26 posted on 07/26/2010 4:58:46 AM PDT by dangus
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To: LibWhacker

bump


27 posted on 07/26/2010 5:03:05 AM PDT by dangerdoc
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To: LibWhacker

Pop science masquerading as real science. It’s too bad these “scientists” are collecting a salary for making stupid declarations.


28 posted on 07/26/2010 5:52:12 AM PDT by Leftism is Mentally Deranged (leftism: uncurable mental deterioration)
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To: SamAdams76
if it were possible today to travel back to say, the Middle Ages, would anybody actually want to go there?

Beyond historians, archaeologists, assorted crazies with too much time and money, and people whose idea of the Middle Ages comes out of "Robin Hood" and "King Arthur" movies?

Other than that relatively short list, you're right. The Middle Ages had little to offer besides poverty, famine, ignorance, and disease.

I'd have liked to have seen the Library at Alexandria, though. Lots of really good ideas were lost, there.

29 posted on 07/26/2010 7:00:37 AM PDT by wbill
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To: SamAdams76
After all, if it were possible today to travel back to say, the Middle Ages, would anybody actually want to go there?

They'd surely burn us as witches!

30 posted on 07/26/2010 7:40:58 AM PDT by JimRed (To water the Tree of Liberty is to excise a cancer before it kills us. TERM LIMITS, NOW AND FOREVER!)
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To: LibWhacker

Obviously they have not been successful in completing the experiment yet in the future as they have not sent anything back congratulating themselves on a job well done.

Or maybe they did come back, but since there is no possibility of a paradox we didn’t realize they were back here, but they were successful, even without tangible results, and therefore should be given a gazillion dollar grant to continue studying this theory.


31 posted on 07/26/2010 7:46:11 AM PDT by commish (Freedom tastes sweetest to those who have fought to preserve it.)
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To: ClearCase_guy

Bring hand grenades.


32 posted on 07/26/2010 7:56:42 AM PDT by BenLurkin (Will must be the harder, courage the bolder, spirit must be the more, as our might lessens.)
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To: LibWhacker

Oh good! They need something to rescue the piece of crap final episode of Series 5 of Doctor Who, “The Big Bang”. I count at least three full-on temporal paradoxes, so maybe this new time machine will help. And re-booting the Universe like it was a machine? Even Einstein said the universe did not contain the information required to account for what we see. Good grief.


33 posted on 07/26/2010 8:25:29 AM PDT by backwoods-engineer (There is no "common good" which minimizes or sacrifices the individual. --Walter Scott Hudson)
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To: LibWhacker

I agree. Ancient Rome, about 29 AD, then a few hops to determine exactly when The Sermon on the Mount occurs. I will learn enough Greek to be able to speak to my Lord Jesus, and to hear Him say, “O ye of little faith! Did you really have to build a time machine to come and see me? Blessed are those who have not seen, and yet have believed!” To which I would reply, “I would have built 10 time machines just to walk the road with You.”


34 posted on 07/26/2010 8:32:20 AM PDT by backwoods-engineer (There is no "common good" which minimizes or sacrifices the individual. --Walter Scott Hudson)
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To: freebilly

It’s coming...


35 posted on 07/26/2010 8:33:19 AM PDT by GOPJ (..Liberalism is Intolerance..- - Freeper Eric in the Ozarks)
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To: LibWhacker

Uncle Rico tried this


36 posted on 07/26/2010 8:35:34 AM PDT by HereInTheHeartland (I aspire to a large carbon footprint; just like Al Gore's)
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To: SamAdams76
if I could time travel to 12 hours ago, my physical location might well be somewhere in Asia

More likely stranded in space and gasping for air.

37 posted on 07/26/2010 8:43:31 AM PDT by 6ppc (It's torch and pitchfork time)
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To: The Magical Mischief Tour

Well H. G. Wells thought of it 150 years ago.


38 posted on 07/26/2010 8:48:01 AM PDT by mad_as_he$$ (Playing by the rules only works if both sides do it!)
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To: James C. Bennett; SamAdams76; Cboldt; dangus

Was watching a show on the Science Channel last week and they made the point that the dimension of time really does have all the properties of the other three spatial dimensions (except for our inability to travel at will within it).

Upon hearing this, I immediately had an “Aha!” moment with respect to the issue you guys are talking about. Of course, a physicist might say it was a “snuffle, chortle, bwahaha!” moment.

But here is my insight anyway, for your amusement:

Gravity doesn’t take a vacation on objects moving in 3-D space and it wouldn’t stop working on us if we were traveling in time either. As long as we didn’t attach a rocket to our time machine, gravity and Newton’s first law would guarantee our coordinates on the surface of the earth wouldn’t change after a trip in our Wellsian time machine and we wouldn’t materialize somewhere out in the vacuum of space.


39 posted on 07/26/2010 8:50:44 AM PDT by LibWhacker (America awake!)
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To: nnn0jeh

ping


40 posted on 07/26/2010 8:52:24 AM PDT by kalee (The offences we give, we write in the dust; Those we take, we engrave in marble. J Huett 1658)
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To: LibWhacker
Here is an image of the time machine:


41 posted on 07/26/2010 8:55:53 AM PDT by Lancey Howard
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To: LibWhacker

Why do they think there’s a real “grandfather paradox”? The molecules in your body don’t care about an association you have with someone in the past.
You’ll go right on existing if you kill your grandfather, the universe does not care, it’s just a paradox in our minds.


42 posted on 07/26/2010 8:56:55 AM PDT by Brett66 (Where government advances, and it advances relentlessly , freedom is imperiled -Janice Rogers Brown)
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To: freebilly

‘could I interest you in our maintenance and repair warranty upgrade’ ?


43 posted on 07/26/2010 9:12:00 AM PDT by WOBBLY BOB (drain the swamp! ( then napalm it and pave it over ))
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To: LibWhacker

Observationally, the universe is expanding. Thus for one to go back in time it would seem necessary to shrink the universe in it´s entirety to what it´s radius was at a given time in the past. Or, to go forward, the expansion would seem to have to be accelerated. The energy inputs required for either would seem so large as to be in the limit of infinity. Not to even mention the alignment of every particle, which would seem to have to be precisely as it was in the past, or taking into account any randomness of the future.

In other words, I don´t think you can do it. .


44 posted on 08/01/2010 1:19:45 PM PDT by onedoug
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