04 Sep 10
For me it's that time is NOT a constant. It's been proven that time slows down for objects traveling at speeds, and the faster they go the more time slows down.
They actually have to account for these changes when we use GPS.
I've always thought of time as a kind of abstract idea. But as it turns out it's something real and tangible, and it can even be manipulated. I can't even begin to wrap my mind around this phenomenon.
04 Sep 10
Originally posted by KazetNagorraYou're a quantum physicist? That's impressive.
As a quantum physicist myself, I don't easily get shocked at nature being weird anymore...
Can you describe the field? The impression my uneducated mind gets from watching the science channel is that quantum physics is a bunch of pie-in-the-sky - anything is possible theories. Is there stronger science backing it than I've been lead to believe?
04 Sep 10
Originally posted by FabianFnasAgain, I'm the layman. What is an example of a particle that can be "entangled" with another? Are we talking about atoms, or something smaller?
Quantum entanglement, definitely Quantum entanglement.
http://en.wikipedia.org/wiki/Quantum_entanglement
Are they mysteriously linked regardless of distance? How far apart have they observed the link? Is there a laps of time for one particle to be reacting to the other?
Last question - has the phenomenon been observed when the particles are manipulated, or do they simply go about their natural state with relative behavior to each other?
04 Sep 10
Originally posted by USArmyParatrooperJust as GPS wouldn't work without taking relativity into account, many other modern marvels would not work unless we took quantum effects into account. Its my understanding that quantum effects must be taken into account with modern processors, hard disks and other devices that have very small parts.
The impression my uneducated mind gets from watching the science channel is that quantum physics is a bunch of pie-in-the-sky - anything is possible theories. Is there stronger science backing it than I've been lead to believe?
Quantum effects are very real and there is a lot of very solid science behind it.
There are some aspects that are counter-intuitive (rather like relativity can be) and there are some aspects that are not yet fully understood, but the field itself is very important and perfectly good solid science.
04 Sep 10
Originally posted by USArmyParatrooperThe Second Law of Thermodynamics.
For me it's that time is NOT a constant. It's been proven that time slows down for objects traveling at speeds, and the faster they go the more time slows down.
They actually have to account for these changes when we use GPS.
I've always thought of time as a kind of abstract idea. But as it turns out it's something real and tangible, and it can even be manipulated. I can't even begin to wrap my mind around this phenomenon.
04 Sep 10
1 edit
Originally posted by USArmyParatrooperOn the contrary, quantum physics is very accurate. Some theoretical predictions for the value of certain constants of nature have been experimentally verified to an accuracy of 10 digits. It doesn't describe everything, though, there is still no satisfactory account for gravity in quantum theory for example.
You're a quantum physicist? That's impressive.
Can you describe the field? The impression my uneducated mind gets from watching the science channel is that quantum physics is a bunch of pie-in-the-sky - anything is possible theories. Is there stronger science backing it than I've been lead to believe?
It's pretty difficult to appreciate the accuracy of quantum physics without a solid mathematical understanding, though.
04 Sep 10
Originally posted by USArmyParatrooperWhat is an example of a particle that can be "entangled" with another? Are we talking about atoms, or something smaller?
Again, I'm the layman. What is an example of a particle that can be "entangled" with another? Are we talking about atoms, or something smaller?
Are they mysteriously linked regardless of distance? How far apart have they observed the link? Is there a laps of time for one particle to be reacting to the other?
Last question - has the phenomen ...[text shortened]... pulated, or do they simply go about their natural state with relative behavior to each other?
Pretty much anything can be entangled, at least in theory. In experiments it's usually atoms or smaller particles like photons.
Are they mysteriously linked regardless of distance?
Yes.
How far apart have they observed the link?
I don't know.
Is there a laps of time for one particle to be reacting to the other?
No.
Last question - has the phenomenon been observed when the particles are manipulated, or do they simply go about their natural state with relative behavior to each other?
It depends on the kind of manipulation. If you manipulate something that is relevant for the entangled property, then the entanglement usually ceases to exist.
04 Sep 10
Originally posted by KazetNagorraThe reason I ask that last question is because I'm pondering a possible theory.
[b]What is an example of a particle that can be "entangled" with another? Are we talking about atoms, or something smaller?
Pretty much anything can be entangled, at least in theory. In experiments it's usually atoms or smaller particles like photons.
Are they mysteriously linked regardless of distance?
Yes.
How far apart have ...[text shortened]... that is relevant for the entangled property, then the entanglement usually ceases to exist.
Perhaps the two entangled particles were (excuse the crude analogy) cut from the same mold at the same time. Perhaps they're not actually linked, but rather, act independently in the exact same manner.
Kind of like if two different people put the same DVD movie in the same type of DVD player at the exact same time - they will mirror each other no matter how far away their televisions are.
04 Sep 10
1 edit
Originally posted by USArmyParatrooperIn general, entangled particles don't act in the same way.
The reason I ask that last question is because I'm pondering a possible theory.
Perhaps the two entangled particles were (excuse the crude analogy) cut from the same mold at the same time. Perhaps they're not actually linked, but rather, act independently in the exact same manner.
Kind of like if two different people put the same DVD movie ...[text shortened]... he exact same time - they will mirror each other no matter how far away their televisions are.
04 Sep 10
1 edit
Originally posted by USArmyParatrooperUnless I am mistaken, the two slit experiment works perfectly well on starlight.
Are they mysteriously linked regardless of distance? How far apart have they observed the link? Is there a laps of time for one particle to be reacting to the other?
So theoretically, the effect can be observed for distances in the millions of light years and times of millions of years.
Maybe someone here knows whether it has actually been performed with light from distant galaxies, and whether it does demonstrate entanglement of those distances and times.
05 Sep 10
1 edit
Originally posted by USArmyParatrooperIf quantum physics was just pie-in-the-sky then the semiconductors in your computer would not work nor the lasers that send signals for your message down fibre-optic cables and you would not be able to post the message: “…The impression my uneducated mind gets from watching the science channel is that quantum physics is a bunch of pie-in-the-sky - anything is possible theories….” Nor any other message to any internet forum.
You're a quantum physicist? That's impressive.
Can you describe the field? The impression my uneducated mind gets from watching the science channel is that quantum physics is a bunch of pie-in-the-sky - anything is possible theories. Is there stronger science backing it than I've been lead to believe?
I think you don't realise just how much of our everyday technology relies on quantum physics being right else that technology would simply not work. And this is not to even mention the fact that, if quantum physics was wrong, the reactive sites in the enzymes in your body would not function and you would be dead! Much of chemistry can only be fully explained by taking into account quantum effects.