# 2 States: KBC -> Quantum Computing

No, the blog is not on the movie “**2 states**”, neither its on “**Kaun Banega Crorepati”, **but the blog is on, one of the most interesting and emerging technology “*Quantum Computing**”.*

Then, why KBC and 2 states in the heading? Lets quickly understand the context.

Suppose you are on the hot seat of KBC and playing for one crore, the final question. You are totally confused between two options from the given 4 answers. In the classical world you can figure out the right answer by choosing either of the 2 options in sequence i.e. you can choose only one option at a time. You have equal probability of loosing one crore. You can find out the right answer only by choosing or trying out both the options one after another. But you dont get 2 chances in KBC for one question. Is there a ** magical** way of trying out both options at once?

Yes, the answer is Quantum Computing based on the concepts of Quantum Mechanics, where a particle can be in

2 statesat the same time.

Quantum computing gives us the power of trying out multile options at once, using **Qubits. **In classical world at any given point, the state can be either 1 or 0, its called classical bit. But in the world of Quantum Computing, state can be both 1 and 0 at the same time, its called Qubit.

This principle of being in 2 states is called ** Superposition, **the most important concept in Quantum Computing.

The other very important concept of Quantum Computing is ** Entanglement. **It is basically strong relationship or correlation between 2 particles. If the state of one particle is observed the state of the other particle is known, as they are strongly correlated. This strong correlation exists in any given condition and it remains unaltered, even if the 2 particles are at the 2 ends of the universe (This heavy universe statement is just to strongly emphasize the strong relationship between the 2 particles, and the concept of entanglement).

These 2 quantum mechanics concepts have led to one of the pathbreaking research in quantum computing. Its soon going to be reality in many real-world applications.

We will talk in detail about few advancements in Quantum Algorithms and its applications in subsequent blogs.

“Your problem has already been solved, you just have not got to the point in time yet” — Sue Moses