Quantum Computing Concepts - Quantum Bits

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The basic unit of information in a quantum computer is the quantum bit. It shares some features with the familiar “classical” bit, but it also has some very special properties, unique to the quantum world, such as the ability to be in a superposition of 0 and 1. In Quantum Computing Concepts, Professor Andrea Morello of UNSW Australia explains the basic properties and features of quantum bits, before showing how they are put to use in quantum computers.

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[konstantinsverdlov]

I just watch this for the shirts! AMAZING!

[TheLivingHeiromartyr]

A collection of n classical bits can be in 1 of 2^n states. The point is that there are infinitely many states that on qubit can be in---a cubit is a two-dimensional complex vector, where the basis vectors are the two classical states.
More generally, a list of n qubits is a 2^n dimensional complex vector, where the basis vectors are the 2^n classical states.

[xXSWIZZERXx]

You say the Q bit can be flipped up or down fast but what if you tuned the microwaves in at the same time to make the Q bit flip up n down at such a rate that it can be both at the same time? I was under the impression a Q bit could be in 2 states at one time not changed from one to the other quickly. It's basically a binary function that works faster. Such a shame as I thought it was in 2 states at once breaking binary function & psychics. But never the less it is still progress.

[pythonprofreak]

They will never include that in Computer Science's Computer Architecture course. Maybe 10 years from now?

[petergeorge]

Thank you, That helps me know better.