# Quantum computer

**Published by:** [AlexeySm](https://paragraph.com/@0x975f/)
**Published on:** 2023-01-22
**URL:** https://paragraph.com/@0x975f/quantum-computer

## Content

A quantum computer is a computing device that uses the phenomena of quantum mechanics (quantum superposition, quantum entanglement) to transmit and process data. A quantum computer (unlike a conventional one) operates not with bits (which can take on the value of either 0 or 1), but with qubits that have values of both 0 and 1 at the same time. Theoretically, this allows processing all possible states simultaneously, achieving a significant advantage (quantum superiority ) over ordinary computers in a number of algorithms. A full-fledged universal quantum computer is still a hypothetical device, the very possibility of building which is associated with a serious development of quantum theory in the field of many particles and complex experiments; developments in this area are associated with the latest discoveries and achievements of modern physics. At the end of the 2010s, only a few experimental systems were practically implemented, executing fixed algorithms of low complexity.

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