Thread 16834924

Are those things actually real or just smoke and mirrors? What's the use of them? How do they work? How can something be in both states? Pictures of quantum computers i see look like on purpose designed by sci fi artist to make it look weird

>>16834924 (OP)
>How can something be in both states?
It isn't. If you think about quantum things (in physics), you need to stop thinking about things as fixed particles which either do or do not occupy a state. In the classical world, we describe things as such. in the quantum world, prior to measurement, we describe it in terms of its probability to occupy one state or the other (with obvious generalization if there are more states).

>>16834924 (OP)
They're real just very error-prone and shitty and have some serious scaling issues.
The thing isn't in both states you just mathematically must consider both states to the get the correct probability of it being in one of the two states.
That picture is not a quantum computer btw. It's a dilution fridge. You're basically looking at a gas handling system which mixes and separates helium 3 and 4 to produce cooling power.

>>16834939
so how does an actual quantum computer look like

>>16834944
based and cyberpunk

>>16834944
https://duckduckgo.com/?q=the+willow+chip&ia=images&iax=images

>>16835253
this cannot be real

>>16834924 (OP)
My understanding of IBM's model is it uses superconductors and a capacitor to create a quantum anharmonic oscillator state for the Cooper pairs. This allows them to practically limit the state to two energy levels.
The algorithms work by doing operations on the wavefunctions; state transitions, phase shifts/rotations, all the normal stuff. But the state can be in a superposition of both 0 and 1.
Oh and qbits can couple to each other, expanding the possible super positions.
Grover's algorithm is a famous one that searches an unstructured database.
It essentially searches all elements at once, marks the correct one then modulates the amplitudes of the wrong states so when you measure the answer there is a high chance it is the correct answer.

>>16834944
WHAT****** does it looks like

>>16835751
>>16834924 (OP)
And to answer your question, no they are not real. It's just cope and bullshit. They might make some quantum computer-ish devices for very specific and mostly useless calculations, but they are extremely far from a general purpose quantum computer that could for example run Shor's algorithm on large integers.

>>16834924 (OP)
Let's build quantum computers!

>>16835747
intredasting

>>16834924 (OP)
there are no quantum computers. there are quantum calculators and ALU