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Quantum communications
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Space Station Commander  
Joined: Mon May 31, 2004 9:47 pm
Posts: 737 Location: Yerushalayim (Jerusalem) - capital of Israel! 
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 Quantum communications Posted on: Fri Oct 09, 2009 10:18 amCan quantum communications using entangled particles make communications between any distance faster than the speed of light, even instantaneous?
_________________ “Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.” -Leonardo Da Vinci |
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Space Station Commander 
Joined: Mon Oct 06, 2003 9:22 pm
Posts: 858 Location: New York, NY
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Re: Quantum communications Posted on: Fri Oct 09, 2009 9:05 pm yes asterisk, but you can't extract any information from it until you get the signal that tells you something about the state of the encoded message (or something like that, i don't know exactly), so it can speed up the information processing as you can decode the message for various possible states, but won't actually know which one is right until the light signal reaches you. it's possible there's some way around this but as far as i'm aware physics has not discovered it yet.
_________________ Cornell 2010- Applied and Engineering Physics Software Developer Also, check out my fractals |
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Space Station Member  
Joined: Sun Dec 30, 2007 6:16 pm
Posts: 314
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Re: Quantum communications Posted on: Sat Oct 10, 2009 11:28 am And there's no way of determining the state until the entanglement is created?
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Space Station Commander
Joined: Mon May 31, 2004 9:47 pm
Posts: 737 Location: Yerushalayim (Jerusalem) - capital of Israel!
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Re: Quantum communications Posted on: Sat Oct 10, 2009 6:42 pm TerraMrs wrote: yes asterisk, but you can't extract any information from it until you get the signal that tells you something about the state of the encoded message (or something like that, i don't know exactly), so it can speed up the information processing as you can decode the message for various possible states, but won't actually know which one is right until the light signal reaches you. it's possible there's some way around this but as far as i'm aware physics has not discovered it yet. Any information? _________________ “Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.” -Leonardo Da Vinci |
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Moderator 
Joined: Mon Feb 09, 2004 4:01 am
Posts: 750 Location: New Zealand
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Re: Quantum communications Posted on: Sun Oct 11, 2009 4:43 am Apparently information travels at the speed of light. Or something.
The universe is rather peculiar. _________________ What goes up better doggone well stay up! - Morgan Gravitronics, Company Slogan. |
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Rocket Constructor 
Joined: Sat Nov 07, 2009 4:09 am
Posts: 6
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Re: Quantum communications Posted on: Thu Dec 17, 2009 10:48 pm There is an interesting book that came about exactly about that called, "the god particle". From what I understood of it faster than light communications is not a possibility - but quantum computers that can break any current code, 100% secure communications, and slower than light teleportation are.
For some reason I have the vague memory reading that it is possible that controlling the higgs bosom could be used for FTL communication as gravity is instantaneous. I wonder if that's true? Come on Hadron collider! Don't blow up on me now! |
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Spaceflight Participant  
Joined: Wed May 21, 2008 4:21 pm
Posts: 75 Location: Baltimore, MD
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Re: Quantum communications Posted on: Fri Dec 18, 2009 5:58 pm Pronto wrote: There is an interesting book that came about exactly about that called, "the god particle". From what I understood of it faster than light communications is not a possibility - but quantum computers that can break any current code, 100% secure communications, and slower than light teleportation are. For some reason I have the vague memory reading that it is possible that controlling the higgs bosom could be used for FTL communication as gravity is instantaneous. I wonder if that's true? Come on Hadron collider! Don't blow up on me now! Gravity is not instantaneous, otherwise gravity waves would not be possible to detect. Of course, the theory says we can detect them, but we haven't actually detected any yet...hmmm... Of course nobody knows how gravity actually WORKS.... On the Q-Comm - I have no idea  _________________ Emory Stagmer LCROSS FSW Lead Engineer Bass/12string/windsynth for Ezekiel's Wheel "We can lick gravity, but the paperwork is overwhelming" -- Werner Von Braun "It's all fun and games until the potato chips get loose." (said of the ISS by Gizmodo on space.com) "A journey of a thousand miles begins with a single step. A journey of a hundred thousand miles begins with lots of flames, noise and smoke!" -- Emory Stagmer |
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Space Walker  
Joined: Thu Sep 17, 2009 2:25 pm
Posts: 157 Location: Ireland
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Re: Quantum communications Posted on: Sat Dec 19, 2009 7:57 pm VAXHeadroom wrote: Gravity is not instantaneous, otherwise gravity waves would not be possible to detect. Of course, the theory says we can detect them, but we haven't actually detected any yet...hmmm... Of course nobody knows how gravity actually WORKS.... On the Q-Comm - I have no idea That's interesting, if I can just clarify what you are saying... The gravitational effect that Jupiter has on the Earth is in the direction that we see light coming from Jupiter, not the real instantaneous direction of Jupiter. Is that correct? I had always thought the effect was actually in the real direction of Jupiter, which is offset by a minute angle from the observed direction. johno |
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Moon Mission Member  
Joined: Tue Jul 15, 2003 8:46 pm
Posts: 1204 Location: Kapellen, Antwerp, Belgium, Europe, Planet Earth, the Milky Way Galaxy
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Re: Quantum communications Posted on: Sun Dec 20, 2009 1:05 am I read somewhere some years ago that if the sun would magically disappear, the earth would keep going around it for slightly more than 8 minutes, the same time it takes for the light (or lack of it) to reach earth.
Some information about the speed of gravity: http://en.wikipedia.org/wiki/Speed_of_gravity _________________ Heavier-than-air flying machines are impossible. - Lord Kelvin, 1892 |
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Moderator
Joined: Mon Feb 09, 2004 4:01 am
Posts: 750 Location: New Zealand
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Re: Quantum communications Posted on: Sun Dec 20, 2009 3:31 am Sigurd wrote: Some information about the speed of gravity: http://en.wikipedia.org/wiki/Speed_of_gravity Well I just learnt something new  _________________ What goes up better doggone well stay up! - Morgan Gravitronics, Company Slogan. |
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