Quantum-Computing in brief

Quantum computing will be 40 next year. In 1981 Richard Feynman, an American physicist, spoke at a computing conference, observing that “nature isn’t classical, dammit, and if you want to make a simulation of nature, you’d better make it quantum mechanical, and by golly it’s a wonderful problem, because it doesn’t look so easy.”

It works based on Qubits not bits , which means at each instant it can be both 0, or 1 . To understand it better one needs to have realization of quantum mechanics, which explains the behaviour of matter and its interactions with energy on the scale of atoms and subatomic particles. So now we designed a 300 atom quantum-computing crystal so powerful that in order for a conventional computer to match it, that computer would have to be the size of the known universe. Although quantum-computers are not faster than super computers but they can process very complicated tasks that without quantum-computing it is not possible at all and it takes years. Quantum-computers require totally different programming. They compute on individual atoms. Any type of interference causing vibration of matters in atoms. So instability is the main problem that we have now with quantum-computers.

These computers will help us find the most expedient solution to a complex problem. As such, they're poised to revolutionize the way we go about dataanalysis and optimization — including such realms as air traffic control, courier routing, protein modeling, weather prediction, database querying, and hacking tough encryption schemes.

Professor Lili Saghafi

There are five criteria that you need to have a viable platform for quantum computing.(IBM)

1. You need to have a system that has, that you can set single out from it well-defined qubits, two level systems analogous to 0s and 1s of the binary classical computer.

2. You need to be able to prepare qubits in a defined state.

3. You need to be able to keep them in that state without very much decoherence for a long period of time.

4. You need to do operations on those qubits analogous to classical operations,

5. you need to be able to measure those qubits at the end of the algorithm.