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The Importance Of Quantum Computing

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Will the emergence of quantum computers pose threats to our encryption systems?

Quantum computing is one of the hottest topics in the technology world. Documents from whistle-blower Edward Snowden has shown that the National Security Agency (NSA) of the USA has spent £49m for the development of a quantum computer that is capable of breaking encryption. A practical quantum computer still does not exist but it has already ignited many discussions among scientists about its potential and power. The aim of this essay is to take a closer look as to what quantum computers and quantum cryptography are and how they will affect our current ways of encrypting communication.

Quantum mechanics

Nobel laureate Niels Bohr once said, ‘Anyone who is not shocked by the quantum theory has not understood it.’ Quantum mechanics is a really bizarre topic that it is impossible to explain it in a few words. However, it is important that we grasp the basic principles of quantum mechanics before trying to understand what one of its application, quantum computing, is all about. I will try my best to explain the topic in the shortest and easiest possible way. …show more content…

Classical mechanics is deterministic, whereas quantum mechanics is probabilistic. The former allows us to describe the state of a system using its position and momentum. For example, when we throw a ball, if we know it’s velocity when t=t0, we can easily predict it’s displacement when t=t1 using the equations of motion. Another example is that we can predict the force needed to accelerate the ball with a known mass to a=a1 using F=ma. However, subatomic particles do not behave like the ball in the macroscopic world and we must use quantum mechanics to understand more about

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