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A new step towards quantum computing

A new step towards quantum computing

SCIENCE 536 0 0 Download
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In Summary

Scientists have placed a new milestone in the field of quantum computing. They have innovated a new quantum bit which can enhance the capability of quantum computers.

Editor Posted by Heena

Quantum computing basically involves deep study of quantum computers that are based on the phenomena of quantum-mechanics. Some of the popular techniques used for data operation are entanglement and superposition. Quantum computers are very much different from normal computers. They are not based on transistors like normal electronic computers. Quantum computing is analog in nature, while normal electronic computing is digital in nature and uses binary bits which are 0 and 1. Quantum computers are based on quantum bits which can lie in an infinite range of states. A quantum bit is called a qubit which is used by quantum computers.

A single qubit can be a representation of a zero, a one, any superposition of these two states; a qubit pair can any valid superposition of 4 states, and three qubits can be any valid superposition of 8 states. A general fact which can be deduced is n qubits can be any valid superposition of 2n states.

How quantum computer is different from a fundamental one

A quantum computer with a fixed number of qubits is quite different from a normal computer which is itself composed of 0’s and 1’s. If we want to represent n-qubit system using a normal computer, a very large amount of storage is required, which is roughly about 2n complex coefficients. This fact may prove that quantum computers hold 10 times more data than normal computer, but qubits are probability-based as the superposition is probabilistic. This fact cannot be overlooked. The final state is one of the possible configurations after applying all permutations and combinations. Moreover, the belief that qubit has one definite state may be wrong because the superposition may vary from time to time. This change in the superposition of states directly affects the final result of any computation.

How quantum computer is creating magic

Quantum computer has thrilled the market of digital world. The main benefit of quantum computing is its capability to perform any task at a double speed than classical computer. The main reason behind this is the change of atoms is faster in quantum computers. But this really does not mean that quantum computers can completely replace the classical computers. Many tasks can be done effectively by quantum computers, but they are not fit for all basic tasks.  Another miracle which quantum computers can show us is when complex algorithm calculations are performed which is a smooth task for these computers, while an extremely tedious task for classical ones.  

Although the idea of quantum computing is fabulous, but when the feasibility analysis is performed, it is a bit difficult to implement it. The technology required for qubit implementation is not available in real presently. The research in the field of quantum computing is going on continuously and at a fast pace. People are researching on it with complete interest and motivation. Google has worked on a simulation model which provides a brief idea on how a quantum computer looks like, but many are not convinced as they do not get a clear picture yet.