It was in 1951 when the first commercial digital computer UNIVAC( Universal Automatic Computer) was produced. The giant computers operated on vacuum tubes and laid the foundation for the development in the field of digital computers to make the calculations faster. Today , when we look back the innovation in the field of digital or classical computers , we can say that we have come a long way ahead. Today , there is hardly any field which is not touched by the computation marvels of the classical computers. From desktop PC;s , to the data centers , cloud computing, telecommunications , satellites , we all depend on the programs executed by these digital chips. Gaming has become an art of the digital world and the development in the field of the processors . As change is a part of the scientific field , we are not entering into a new way of computing things.
The classical computing performs operations on the fundamental knowledge that we have defined the language of the computing to operate on the bits. The 0 and 1 are the basic fundamental blocks of classical computing. It is also the basic building block of quantum computing accept for the fact that the states 0 and 1 can exist simulatenously at the same time. This is what we call Superposition. It is because of the phenomenon of superposition that the quantum computer can store and manipulate vast amount of data as compared to classical computers.
As most of us have already read in the books that there could either be a 0 state or a state 1, the question often arise , how can a system be in two states at the same time. Well, we can say welcome to the world of quantum mechanics.One of the reason that we still do not see quantum computer in reality on our desks is because of the difficulty to maintain the qubit. The stability of the qubit depends on the temperature, other environmental factors.Currently multiple vendors are working in different ways to create the stable qubits. These qubits include ion trap(IonQ), superconducting(IBM), photonic(PsiQuantum andXanadu), cold atoms(ColdQuanta and AtomComputing) and topological(Microsoft).
What is the reasons that countries are working at a pace on quantum Computing?
What is the reason we still do not see quantum computers commercially available.?
Quantum computers operate on qubits and it is difficult to maintain the stability of these qubuts. Secondly, quantum computers are at a stage where the classical computers were in 1950’s. Large and mainly confined to the lab envirionment used for research purpose.
The first prototype of Quantum computers that would be made available would be the hybrid model where the quantum computing combines with the classical computer.