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Article Dans Une Revue Solid-State Electronics Année : 2019

When will we have a quantum computer?

Michel Dyakonov
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Résumé

- A classical computer with N bits at any given moment is in one of its possible 2N states. - In contrast, the state of the hypothetical quantum computer with N qubits is defined by the values of 2N continuous parameters, the quantum amplitudes. - To beat your laptop in performing some special tasks, like factoring very large numbers, one needs ∼1000 qubits. - Accordingly, the number of continuous variables that should be under our control is at least 21000 ∼ 10300. - Thus the answer to the question in the title is: as soon as physicists and engineers will learn to control thus number of degrees of freedom, which means NEVER.
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hal-02302517 , version 1 (22-10-2021)

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Paternité - Pas d'utilisation commerciale

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Michel Dyakonov. When will we have a quantum computer?. Solid-State Electronics, 2019, 155, pp.4-6. ⟨10.1016/j.sse.2019.03.004⟩. ⟨hal-02302517⟩
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