Friday, October 07, 2005

Quantum Entanglement Homepage

The purpose of this 'blog is to discuss the Quantum Entanglement web site. Feel free to provide constructive criticism, corrections, thanks, back links, and ideas for additions.

I look forward to reading your comments!

17 Comments:

At 3:08 AM, Blogger abraxas23 said...

This comment has been removed by a blog administrator.

 
At 3:11 AM, Blogger abraxas23 said...

Thanks for your link, Dave.

I have always been trying to integrate western logic into eastern spirituality. Most western physicists don't seem to like that.

I have just written something that will irritate you for shure. What doesn't irritate isn't worth reading.

greetz

 
At 12:26 AM, Blogger Dave said...

You would need a classical channel between detectors A and B to indicate the polarization. It has been shown that quantum entanglement cannot be used for instantaneous communications. Whatever cards Nature plays to make the whole thing work, She keeps them close to Her chest.

 
At 8:39 AM, Blogger Man said...

hi dave, i've responded to ur comments on my blog. feel free to take a look. thks.

 
At 3:16 PM, Blogger DaoDDBall said...

Hi Dave, thanks for taking the time to leave your thoughts on my blog.

 
At 11:25 AM, Blogger Liken said...

About Faster than light communications and questions you say here.. Two Facts:

1) This would not only FTL comunication but time travel to past comunication. (If quantum eraser is at 1 day light comunication is received 1 day before it is created).

Well, it is OK with Relativity, FTL implies time travel to past.

But..

2) The coincidence counter has a roll in this experiment: To Discriminate between entangled photons that efectively hit the two detectors and which par does not. Entagled photons directions is unknow (Heinsenberg's Principle). Without coincidence counter, that requires a clasical channel not FTL, you don't know if hits at detector 1 are corresponded by "entagled" hits a 2.

But, you might think perhaps in a more advanced statistical comunication, taking in account double hits and lonely hits. But..,as you can suspect all is very well thought.

Liken
------

 
At 12:37 PM, Blogger Liken said...

Sorry for the mistake about point 2. I was improvising. Thats is what really happends:

"
If you only count photon pairs where the entangled photon gets through
the remote polarizer, you do indeed get an interference pattern on the
screen.

If you only count photon pairs where the entangled photon does not get
through the remote polarizer, you also get an interference pattern:
one with *exactly the opposite phase*.

This means that if you count all the photons that hit the screen, you
don't see an interference pattern at all. There are actually two
interference patterns on top of one another, but you have no way of
separating the two unless you already know what happened to the
entangled photon!

The upshot is that casuality is preserved: the proposed apparatus does
not allow faster-than-light signalling. No interference pattern is
observed regardless of the state of the remote polarizer."

 
At 11:53 AM, Blogger Unknown said...

Dear Dave, some part I can't understand with my poor english;

"However, if we rotate the polarizing filter in front of detector A so that the polarizations of the photons that hit the detector are the same(*****) (that is, we can no longer distinguish between clockwise and counter-clockwise polarizations), then the interference pattern appears at both detectors!"

(*****) same with which?

 
At 11:55 AM, Blogger Unknown said...

Dear Dave, please clarify this;

However, if we rotate the polarizing filter in front of detector A so that the polarizations of the photons that hit the detector are the same (???) (that is, we can no longer distinguish between clockwise and counter-clockwise polarizations), then the interference pattern appears at both detectors!

How do the photons arriving at detector B know that the polarizations have been "erased" at detector A?

(???) same with what or which?

Thanks.

 
At 2:26 AM, Blogger Unknown said...

I would say that life itself is a quantum entaglement!!

 
At 5:13 AM, Blogger kakskee said...

On the sciam.com website under blogs title "by what measure does time exist" I (kakskee) made a comment illustrating that"gravity maintains a state of interconnectedness throughout the universe (travel time not required). I am curious to know if gravity could be the hitch linking entangled particles. Merzi

 
At 4:24 PM, Blogger Swiss_Ch33ze said...

ooooooookaaaaaaaayyy then. I heard of this concept long ago and when I first heard it the name escaped me.... It wasn't until last night when I was watching the science channel, alittle program called "How to teleport" was on, and briefly mentioned "Quantum Entanglement." Being that I heard about it years before I understood the concept alittle bit, but I question one thing that I noticed them say in about 2 of the videos of the 12 that I watched today. What these Physicists said was that if you where to take one of the entangled atoms and send it somewhere really far, it would move instantly in the same way and same time you move the other that you kept with yourself. I'm only 19 and the first time I heard this was when I was around 13 maybe 14 I can't remember, but what I do remember and correct me if I'm wrong, is that if one of the atoms or particles where to move in one way the other would move in the exact opposite manner, nonetheless at the same time. So my question was - Why is it if you where to move one atom/particle thats entangled to another, from here to mars, that the other doesn't move that same amount of distance in the opposite direction? Other questions I have are - Is it just the rotational movement of the atoms/particles that are being affect or is it both that and the directional movement? And - Is there something I could've missed during they're explanation that just went over my head that made me ask these questions?

I also wanted to say to Hoagy that I had that same idea several years ago only I was too young and dumb to carry out any sort experiment, and now that I know how to make this sort of thing happen I simply do not have the funding. All I have to say is I will try to carry this experiment out when I have proper computer knowledge and understanding as well as both Mechanics and quantum physics. (It Shouldn't take too long)

 
At 5:28 PM, Blogger Swiss_Ch33ze said...

I wanted to add that if you were to have detector A here and detector B somewhere else if I where to write a written program stating:
If the photon makes one complete rotation(After sometime of being idle), then the information sent is intended for detector B. If the photon rotates a half of a rotation, then the information is intended for detector A. (Or something like that)

For those of you whom don't understand how the information is being sent - The info is being sent by both the rotation and none rotation of the photon. (the rotation meaning "1" and none rotation "0". Computer nerds know what I'm talking about)

However...

Another way is stating in the programming that after the first rotation the next half rotation means "1" and the opposite of that rotation is "0"

This means that the first 2 bits initializes that the next couple of bits are meant for a certain detector and how to read each rotation.

 
At 5:32 PM, Blogger Swiss_Ch33ze said...

Lol (at myself) "if I where to write a written program"

What other kind of program would I write if it wasn't written???? (Don't answer that)

I should have edited my comment before posting it..... HAhaha

 
At 6:39 PM, Blogger Swiss_Ch33ze said...

Oh Yea, and who's to say we can't use more then one set of Entangled photons/atoms (whatever it is thats being entangled).

This way one set can be for sending and the other for receiving.

or 4 sets in total. 2 hyper-threaded for sending and the other 2 (hyper-threaded) for receiving.

Just A Thought...

 
At 6:49 PM, Blogger Swiss_Ch33ze said...

I'm going to try to bookmark this page to see if I got some feedback.

Chances are I'm not going come back anytime soon, so just email me or something.....

ItsScienceMan@aol.com

(I just noticed the whole "i" before "e" except after "c" rule doesn't apply to the word "science")

 
At 10:03 AM, Blogger Unknown said...

Dear friends, the experiments of 'entanglement concern
simultaneous transmission at distence of information. This is one of important aspects to understand how external vibrations are immediately turn in sound sensations in our
brain, or as external electromagnetic fields is
transformed immediately into light sensations that we perceive in our brain's vision.
For example, if you believe the relativity of Einstein, then you must think that the sun has risen at the horizon about eight minutes before your actual perception
or in the evening you believe that you can always see the sun when really is just disappeared at the horizon eight minute before.
If instead it is considered that the photons can be stacked in a multiple Entaglement
, forming a field of simultaneously information
, so that through the last explanation yo nderstan why you see contemporarily sunrises and sunset at the 'horizon without any delay as in fact we experience every day without too believe the reductionistic model
of relativity of Albert Einstein. Paolo Manzelli
; pmanzelli@gmail.com; www.edscuola.it/lre.html

 

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