Quantum Computers

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Domenii: Calculatoare, Engleza

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The history of computer technology has involved a sequence of changes from one type of physical realisation to another. Today’s advanced techniques can create chips with features only a fraction wide. Soon they will be even smaller and inevitably reach a point where logic gates are so mall that they are made out of only a handful of atoms.

Every 18 months microprocessors double in speed.

FASTER=SMALLER

..But since when we can continue like that?

Finally it will come to an end, right?

..So what is the solution?

What does quantum physics have to do with computing? How can a quantum computer work and what makes it different from a traditional computer?

In order to understand the concept of quantum mechanics..

Classical (Newtonian) Mechanics deals with macroscophic system while Quantum Mechanics deals with microscopic system-atomic and subatomic level.

On the atomic scale matter obeys the rules of quantum mechanics, which are quite different from the classical rules that determine the properties of conventional logic gates. So, if computers were to become smaller in the future, quantum technology must replace or suplement what we have now. The point is, however, that quantum technology can offer much more than cramming more and more bits onto silicon and multiplying the clock speed of microprocessors. It can support an entirely new kind of computation with new algorithms based on quantum principles!

Rather than store information as 0s or 1s as conventional computers do, a quantum computer uses qubits – which can be a 1 or a 0 or both at the same time. This “quantum superposition”, along with other quantum effects manipulate all combinations of bits simultaneously, making quantum computation powerful and fast.

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