Quantum Computers

Adaugat la data : 05.09.2010 Nume referat: Quantum computers Categorie: Fizica Uploader: Razvan Accesari: 136 Marime: 373 Kb

quantum computers nowadays the information technology is evolving rapidly. the search is primarily focused on the words compact and efficient. as the number of transistors per cm2 increases rapidly its fair to say that as they get smaller, the next computational stage is going to be performed at atomic scale. at this level, the principles of classic physics and mechanics will be taken over by some new concepts the quantum laws. the point of this is that quantum technology can offer much more than the classical one and although its still in its primordial stages, this technology is opening new paths and new horizons in the new computational era. basic principles in a classical computational system a bit can have to physic or logic states 1 or 0 or, respectively true or false. these two states can be represented in several ways. for instance the voltage between the plates of a capacitor. a charged capacitor could represent a bit value of 1 and an uncharged capacitor 0. another way to represent or to code a bit of information could be two different electronic states of an atom but an atom can also have a superposition of two states. if a bit can exist in either of two states then it can also exist in a superposition of the two states. in other words, if we want to chose an atom as a physical bit, then its possible to have more than 2 states. it can have both the value 1 and 0 and also any value in between. to understand the idea of a quantum object being in 2 states at once here is a very simple experiment. fig1 a fig1 b fig1 c...


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