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.
That’s the beauty of it. You could get the answer to the meaning of life, but never know what the question was.
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!