/sci/ - Science & Math

"Will there be war in the future?"
"Will aliens attack us in the future?"

That kind of "What If" OP?

>also, out of curiosity, apart from general perception theories and such, what inventions has physics made?

good question...

As far as we know, at this moment it`s impossible to send back information from the future to the present.

But what if some authority manages to send back the answer of any yes/no question to themselves.
Using a modification of the delayed choice quantum eraser experiment.
Please don`t reject this idea immediately as being ridiculous.
Knowledge about qm is too little to conclude it is certainly impossible.

The first authority that comes up with such a device would obtain absolute power.

Just think of it`s applications;
>it could track down any person anywhere on earth
- if we would search in the west of pakistan would we find bin laden?
- if we would search in sector this and this of west of pakistan would we find bin laden?
etc...
>track down any other project to develop this kind of device and make it fail even before the project was started.
"if we seach every room in russia would we find such a device?" yes/no etc..
>manipulate events so they would look "coincidental" but really aren`t.
If we would broadcast a signal with pattern a to b in frequency range x to y would this or that person die in an accident ? (think of butterfly effect)
>predict our future and adjust it as prefered.
as above

So it`s really something to worry about and we`ll better make sure knowledge about this subject is in safe hands that operate as independent as possible.

define quantum computer

bump.

My science friend said this is possible.

The problem with creating a computer that can predict the future is it has to be able to predict the consequences of its own decisions. Which means it not only has to understand its own inner-workings, but the workings of everyone interacting with it indirectly.

A computer like that would have to be god itself.

I`ve been studying my home-made delayed choice quantum eraser for about a month.

Recently i started thinking of modifications to the device so it would be possible to send back the answer of any yes/no questions from the future to the present.

Not that i wanted to change the world or something i just wanted to know if the woman i love has the same feeling for me...
I promised myself after figuring out that one question i would distroy the device and forget about it.

I was parking my car this afternoon and then some guy with sunglasses on and a black suits came out of the van parked next me.

He walked up to me and told me to stop my quantum mechanics experiments or else he would kill the woman i love. He even called her by name i never told anyone. I sould have cut his throat but at that moment i was paralized by fair.

HELP ME /SCI/ WHAT SHOULD I DO?

>>2418895
nope.

http://www.telegraph.co.uk/science/7904712/Quantum-time-machine-allows-paradox-free-time-travel.html

OP here.

I don't mean that d wave bullshit.

Someone told me a quantum computer gives you all the "wrong" answers.

What can we learn from this?

>>2418961
lol

also bump

Come on guys. You can do this.

OP is confusing the quantum reality for the macroscopic reality.
OP has to learn the difference.
OP has to learn that analogies describing the quantum world are just to make it easier to visualise.

Quantum computers can process more than one possibility, compared to the conventional binary, allowing only 1 or 0.
Quantum computers can have the current flowing in both directions, since both quantum states are fulfilled.
Quantum computers are easily hindered because any external influence can disrupt the computing, making it function at normal speed.

I think quantum computers could be the future if they can be isolated from any interference.

>>2418873
>>2418881
>>2418931


Computer is actually a wrong word for such a future-predicting device becoase it should not be compared with process technology anno 2011.

It would just be a device that uses characteristics on the quantum scale, and read out information about a particle, information that might be entanglent to another position in space or time.

Double slit experiment is the grandaddy of all such devices. qm physicists have seriously considered much more complex variations to that experiment that would make such a "what if" machine.
At this moment it`s a common stand that even qm information can not go back in time. But if it turned out it IS possible they would most likely cover it up though.

>But if it turned out it IS possible they would most likely cover it up though.

I doubt it.

People will find out how to do it.

BAMP

bumo