what is the quantum computin?

Question

campare it normal computing

Answer 1

yep indeed @Carlos Afonso

Answer 2

@GAWEN STEASY thanks

Answer 3

http://www.explainthatstuff.com/quantum-computing.html

Answer 4

(Someone said this)

As technology advances, the size of bits in computers decrease. As these bits approach subatomic particular size, they begin to exhibit Quantum mechanics (these bits are appropriately named Qubits).

Imagine a computer searching through a four digit binary number. (E.g. 0000, 0001, 0010...1111). A normal computer would take 16 operations. However, a qubit can take the value of 0 or 1 or both, so you can simultaneously check all values of a digit at once, requiring only 4 operations. Hence, for an algorithm requiring N operations, a Quantum Computer would only need sqrt(N) operations, exponentially increasing the speed of a computer.

Also, you can increase the efficiency further. Due to something known as an Observer Principle, the value of a qubit is undefined until you observe it. Which is to say, it is in all states simultaneously. But due to something called Quantum Entangling, a qubit maybe be entangled to another. Which means, you can accurately predict the value of another qubit. For example, you know a qubit has a value of 0. If you know the other entangled qubit is the opposite of the first, then you know the qubit has a value of 1.

So far so good, but is a there a drawback? Imagine cracking a code, and searching through all the prime numbers. A normal computer would take years to crack it, but a Quantum Computer would take far less time (sqrt(N), remember?). If a company has confidential data, Quantum Computers can hack quickly. There is one way to avoid it; fight fire with fire. All countries could upgrade to Quantum Computers, but that would be very costly.

Google and other large companies have almost developed a commercially viable Quantum Computers. In conclusion, whatever the future of computing may be, Quantum Computers are definitely involved.

P.S. I may have gotten something wrong or incorrect. Please excuse me, I don't know a lot about Quantum Computers. 😅

Answer 5

Well, Ahmed could googled it indeed but the fact that someone posted a link here made me go there and read it too... this is social learning! :)

Answer 6

@Carlos 🤗👍

Answer 7

For some common techical terms or techology, try search Google, will give you more answers.
Rather then letting members here search Google result and pick one link for you.

Answer 8

Instead of bit, it uses qubit. Because of the superposition of qubit, quantum computers work in parallel. With enough qubits, it could improve database search, factorization, etc.