%0 Journal Article
%T When will we have a quantum computer?
%+ Laboratoire Charles Coulomb (L2C)
%A Dyakonov, Michel
%< avec comité de lecture
%Z L2C:19-197
%@ 0038-1101
%J Solid-State Electronics
%I Elsevier
%V 155
%P 4-6
%8 2019-05
%D 2019
%R 10.1016/j.sse.2019.03.004
%Z Computer Science [cs]/Emerging Technologies [cs.ET]Journal articles
%X - 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.
%G English
%2 https://hal.science/hal-02302517/document
%2 https://hal.science/hal-02302517/file/S0038110118306129.pdf
%L hal-02302517
%U https://hal.science/hal-02302517
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ ELSEVIER
%~ UM-2015-2021