A quantum computer is a computing device that uses the phenomena of quantum mechanics to transmit and process data.
The main difference between a quantum computer and a classical one is the presentation of information. In conventional computers based on transistors and silicon chips, binary code is used to process information. Bit, as you know, has two basic states - zero and one, and may be in one of them. As for a quantum computer, its work is based on the superposition principle, and instead of bits, quantum bits are used, called qubits. The kubit also has two main states: zero and one. However, due to the superposition, the kubit can obtain the values obtained by combining them, and be in all these states at the same time. This is a parallel to quantum computing, that is, the need to review all possible variants of system states. In addition, to describe the exact state of a quantum computer system, you do not need huge computing power and RAM, since for the calculation of a system of 100 particles only 100 cubic, and not trillion trillion bits are enough.
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