Thanks ETL.
· String Theory Ping List ·
· Join · Bookmark · Topics · Google ·
· View or Post in 'blog · post a topic · subscribe ·
Posted on 03/04/2019 11:13:13 AM PST by ETL
Question. A computer is 100% deterministic. At the quantum level, you have no determinism. How do you make a computer from things which do whatever the hell they want at random?
Hope this answers your question...
"In quantum computing, a qubit or quantum bit (sometimes qbit) is the basic unit of quantum information—the quantum version of the classical binary bit physically realized with a two-state device.
A qubit is a two-state (or two-level) quantum-mechanical system, one of the simplest quantum systems displaying the peculiarity of quantum mechanics.
Examples include: the spin of the electron in which the two levels can be taken as spin up and spin down; or the polarization of a single photon in which the two states can be taken to be the vertical polarization and the horizontal polarization.
In a classical system, a bit would have to be in one state or the other. However, quantum mechanics allows the qubit to be in a coherent superposition of both states/levels simultaneously, a property which is fundamental to quantum mechanics and quantum computing. ..."
Bit versus qubit:
A binary digit, characterized as 0 and 1, is used to represent information in classical computers. A binary digit can represent up to one bit of Shannon information, where a bit is the basic unit of information.
However, in this article, the word bit is synonymous with binary digit.
In classical computer technologies, a processed bit is implemented by one of two levels of low DC voltage, and whilst switching from one of these two levels to the other, a so-called forbidden zone must be passed as fast as possible, as electrical voltage cannot change from one level to another instantaneously.
There are two possible outcomes for the measurement of a qubit—usually taken to have the value "0" and "1", like a bit or binary digit.
However, whereas the state of a bit can only be either 0 or 1, the general state of a qubit according to quantum mechanics can be a coherent superposition of both.[2]
Moreover, whereas a measurement of a classical bit would not disturb its state, a measurement of a qubit would destroy its coherence and irrevocably disturb the superposition state.
It is possible to fully encode one bit in one qubit.
However, a qubit can hold more information, e.g. up to two bits using superdense coding.
For a system of n components, a complete description of its state in classical physics requires only n bits, whereas in quantum physics it requires 2n−1 complex numbers.[3]
https://en.wikipedia.org/wiki/Qubit
How do you make a computer from things which do whatever the hell they want at random?
It usually ends in divorce.
“Somewhat like a pinball machine”
Tommy is a documentary about physics?
“What they think they’re seeing is what they’re actually seeing”
Oh my.
I know that I’m real, but I’m pretty sure the rest of you are just here to entertain me, so get to dancing.
Thanks ETL.
“Quasiparticles experimentally shown to interfere for first time”
I think I walked into the wrong thread....is this the way to my tapioca?
A little off topic. I was reading an article recently that said the popularity of string theory was due to it not producing infinities in calculations the way the accepted theory does.
https://plus.maths.org/content/does-infinity-exist
That’s the beauty of it. You could get the answer to the meaning of life, but never know what the question was.
Yes, but you can only determine where your tapioca currently is or it's speed, but not both.
Quantum tunneling- if you didn’t have quantum tunneling you would have no integrated circuits.
https://en.wikipedia.org/wiki/Quantum_tunnelling
The “lucky energy/electron” that gets through the potential barrier (Voltage wall) “tunnels through”, is your “1” or your “zero” depending how you define your reference. “lucky electron” has to gain energy to hop over the wall. It can’t! However under the “right conditions” there is a “probability” it can tunnel through the barrier. Use enough electrons and a number of them get “lucky” go through and provide enough energy to “influence” the other side of the wall. Like throw a “switch” or something similar.
ok ok purists are going to hate the above explanation!
I just wanted my pudding and now I’m in an episode of The Twilight Zone!
Yet, in the many worlds interpretation of quantum mechanics, the damn tapioca can be anywhere and moving at any speed — so keep looking!
It's happened before...
I think the popularity is that it doesn't require a solution to get paid. ;^)
Ask the cat, if you can find him. :>)
From a google search for “dimensions in String Theory”
One notable feature of string theories is that these theories require extra dimensions of spacetime for their mathematical consistency. In bosonic string theory, spacetime is 26-dimensional, while in superstring theory it is 10-dimensional, and in M-theory it is 11-dimensional.
Or is the cat supergendered? Is it both make and female simultaneously (until you check)?
Quick. Get a Marxist activist onto this. Maybe they can highjack Quantum Physics too.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.