Intro
A quantum computer is a device that uses principles of quantum physics to perform calculations; unlike the computers you already know that use bits to store and process information in the form of 0 and 1, quantum computers use qubits, which can represent 0, 1 or a combination of both at the same time thanks to a phenomenon known as superposition.
Historic
According to IBM, in a test experiment published in the journal Nature (more information), it has announced a major breakthrough by claiming that its quantum computer named Eagle has succeeded in overcoming a key challenge in computation. This implies that it has been able to perform a complex computation successfully and accurately, a significant advance in the evolution of this technology.