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A quantum computer is a computer that exploits quantum mechanical phenomena. On small scales, physical matter exhibits
Physics is the natural science of matter, involving the study of matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. Physics is one of the most fundamental scientific disciplines.
Spin is an intrinsic quantum property associated with each particle, which is characteristic of the nature of the particle, just like its mass and its electric charge . It allows us to characterize the behavior of the particle under the effect of its rotational symmetry in space.
A marriage between electronics and magnetism , spintronics is used in many digital devices such as memoriesMRAMwhich we find in our computers. It uses the spin (magnetic moment) of electrons to manipulate them in circuits